THE FRESH WATER ALGAE OF MESS{ON
WELL AND TYKESON POND; MONTANA

(EXCLUDING DE$MI§S AND DEAYGMS)

Thesis §or fire Degree of M. 5.
MKCEEQAN STA'EE UNEVERSITY
Ronald W. Hoham
1966

ABSTRACT

THE FRESH WATER ALGAE

OF MISSION WELL AND TYKESON POND, MONTANA

(EXCLUDING DESMIDS AND DIATOMS)

by Ronald W. Hoham

The major objectives in this study were:

1)

2)

5)

Methods

1)

2)

3)

4)

Samples were

to collect and identify the fresh water algae,
excluding desmids and diatoms;

to compare two types of ponds lying at quite
different altitudes;

to check on variability of flora through

summer months over a two year period.

used in collecting algae were as follows:
taking plankton hauls using No. 25 silk bolting
cloth plankton net;

scraping substrates: submerged logs and rocks;
dipping vials for bottom samples;

squeezing living aquatic plants and non-living
debris.

examined in both living and preserved condition.

All samples were preserved in a 6:5:1 solution (water—95%

alcohol-formalin) added to the sample in a one to one volume.

Each alga collection was examined until no new taxa were noted.

Ronald W. Hoham

Camera lucida drawings were made of each taxon encountered
and measurements were recorded.

The author identified a total of 89 different algal
genera, 215 different Species, and 244 different taxa from
Mission Well and Tykeson Pond, excluding desmids and diatoms.
Sieminskal recorded four additional taxa from Mission Well
not found by the author from either pond. Thus 219 different
species and 248 different taxa are known, of which eight or
5.2% of the latter are new. Eighty-seven Species and 108
taxa are exclusively in Mission Well, 75 species and 78 taxa
are exclusively in Tykeson Pond, and 57 Species and 62 taxa

are common to both ponds.

 

10: Sieminska, ”Algae from Mission Well Pond, Montana,"
Trans. Amer. Microscop. Soc., LXXXIV, No. 1 (1965), 98-126.

 

THE FRESH WATER ALGAE
OF MISSION WELL AND TYKESON POND, MONTANA

(EXCLUDING DESMIDS AND DIATOMS)

BY

Ronald W. Hoham

A THESIS

Submitted to
Michigan State University
in partial fulfillment of the requirements
for the degree of

MASTER OF SCIENCE

Department of Botany and Plant Pathology

1966

ACKNOWLEDGMENTS

I wish to express my sincere appreciation to Dr. G. W.
Prescott, Professor of Botany, Michigan State University,
under whose guidance this thesis was conducted, for his
assistance, suggestions, and confidence which helped me pro-
gress towards the completion of this study.

I would also like to acknowledge the other members of
the guidance committee at Michigan State University: Dr.
Henry A. Imshaug, Associate Professor of Botany and Curator
of the Cryptogamic Herbarium; Dr. Everett S. Beneke, Profess-
or of Botany; and Dr. Gordon E. Guyer, Professor and Chairman
of Entomology for their suggestions and time given in reading
this thesis. I would also like to thank Dr. John H. Beaman,
Associate Professor and Curator of Beal Darlington Herbarium,
for his suggestions and help on the taxonomic section.

My appreciation goes to the graduate students at Michigan
State University who helped me throughout this study. There
are no words available to thank Dennis C. Jackson for his
help, suggestions, and time given to me. I certainly must
thank Janice M. Glime for her willingness to help me type
major sections of my thesis when time was such an important
factor. I also want to thank S. (J.) Hitt for her opinions

and suggestions.

ii

I wish to acknowledge several members of the faculty
and students at the University of Montana Biological Station
who assisted me during this study: Dr. Richard A. Solberg,
Director (1965) and Dr. Robert S. Hoffman, Acting Director
(1966) for allowing me to use necessary facilities at the
station; Dr. William C. Vineyard, Visiting Assistant Professor
from Humboldt State College, for helping me with algal identi-
fications; and Dr. John H. Thomas, Visiting Associate
Professor and Curator of Dudley Herbarium from Stanford Uni-
versity, for his help and suggestions concerning taxonomic
problems.

I want to thank Ronald L. Boyer for helping me tabulate
24 hour pH data; J. Ed Copley, Robin 8. Brown, and Sarah J.
Trebilcock for assisting me in mapping both ponds; Calvin
Ryder for giving me information on Mission Well; and the
Algae Class (1966) for examining collections from both ponds
in an effort to help make my algal study more complete.

I also want to thank J. B. Seago, Soil Scientist, and
John Cloniger at the Soil Conservation Office in Polson,
Montana, for their useful information on soils; and Arthur
B. Whitney, Fire Control Ranger Assistant at the Swan Lake
District of the Flathead National Forest, Montana, for his
general information on both ponds.

Finally, I sincerely acknowledge Dr. Merle Brooks,

Professor of Biology and Director of the National Science

iii

Foundation at the Municipal University of Omaha, for allow-
ing me to use laboratory facilities there and whose inSpira-

tion sparked my interests in going to graduate school.

iv

TABLE OF CONTENTS

INTRODUCTION . . . . . . . . . .

METHODS AND PROCEDURES . . . . .

GENERAL FEATURES OF THE AREAS STUDIED .

SOILS . . . . . . . . . . .
GLACIOLOGY . . . . . . . .
OBSERVATIONS AND RESULTS . . .
MISSION WELL . . . . . . .
PHYSICAL FEATURES .
WATER . . . . . . . .
VEGETATION (other than
VEGETATION (algae) . .
TYKESON POND . . . . . . .
PHYSICAL FEATURES . .
WATER . . . . . . . .
VEGETATION (other than
VEGETATION (algae) . .
SYSTEMATICS . . . . . . . .
CHLOROPHYTA . . . . .
CHRYSOPHYTA . . . . .

EUGLENOPHYTA . . . . .

Page

U'IUTCNH

10
11
12
12
12
12
15
16
17
75

85

TABLE OF CONTENTS - Continued Page

PYRRHOPHYTA . . . . . . . . . . . . . . . 90
CYANOPHYTA . . . . . . . . . . . . . . . . 94
DISCUSSION . . . . . . . . . . . . . . . . . . . . . 121
SUMMARY . . . . . . . . . . . . . . . . . . . . . . 124

BIBLIOGRAPHY . . . . . . . . . . . . . . . . . . . . 197

vi

TABLE

I

LIST OF TABLES

COMPARATIVE TABLE OF THE TWO AREAS STUDIED

vii

Page

15

II

III

IV

VI

MISSION

TYKESON

MISSION

TYKESON

MISSION

TYKESON

WELL:

POND:

WELL:

POND:

WELL:

POND:

LIST OF MAPS

COLLECTING STATIONS
COLLECTING STATIONS
DEPTH CONTOURS, pH STATIONS,
and TEMPERATURE STATIONS
DEPTH CONTOURS, pH STATIONS,

and TEMPERATURE STATIONS

AQUATIC PLANTS

AQUATIC PLANTS

viii

Page

129

151

155

155
157

159

PLATES

I-XIV

XV-XVI

XVII-XVIII

XIX

XX-XXVII

XXVIII

CHLOROPHYTA

CHRYSOPHYTA

EUGLENOPHYTA

PYRRHOPHYTA

CYANOPHYTA

CHLOROPHYTA

LIST OF

ix

PLATES

Pages

142-168
170-172
174-176

178
180-194

196

INTRODUCTION

The author began this study in July, 1965, at the Univer-
sity of Montana Biological Station. The research project
undertaken was suggested by Dr. G. W. Prescott, Professor of
Botany, Michigan State University. The areas studied were
Mission Well and Tykeson Pond, both of which lie in the
northern Mission Mountains of northwestern Montana. The two
ponds are located east of Flathead Lake and west of Swan Lake.
In reference to Flathead Lake, Mission Well is approximately
4.5 miles (7.2 kilometers) northeast of Yellow Bay, and
Tykeson Pond is approximately 2.5 miles (4.0 kilometers)
northeast of Woods Bay.

Mission Well has been referred to as Mission Wells Pond;
however, the author used Mission Well throughout this text
in reference to this pond as listed on the Flathead National
Forest Swan Lake Ranger District Map, 1965. The name Mission
Well does not refer to the well at the east end of the pond.
Tykeson Pond does not have an official name. The author used
Tykeson Pond throughout this text because it is called this
by the District Ranger Station, Bigfork, Montana.

The areas studied interested the author initially for
several reasons. From previous investigations by alga

classes at the University of Montana Biological Station, these

two ponds, at markedly different altitudes, were found to
have an algal flora exceeding those of other bodies of water
examined in the Flathead and Swan Valleys. It was also ex-
pected that the abundant aquatic plants and fallen trees in
both bodies of water would provide additional suitable sub-
strates for algae.
The major objectives in this study were:
1) to collect and identify the fresh water algae,
excluding desmids and diatoms;
2) to compare two types of ponds lying at quite
different altitudes;
5) to check on variability of flora through
summer months over a two year period.
Minor aSpects included a study of the aquatic plants and the

pH.

METHODS AND PROCEDURES

Samples of algae were collected from the shoreline as
well as from the more open water in both ponds. Refer to
Maps I and II and their legends, pages 128-151, for collect—
ing stations. Methods used include the following:

a) taking plankton hauls using No. 25 silk bolting cloth

plankton net;

b) scraping substrates: submerged logs and rocks;

c) dipping vials for bottom samples;

d) squeezing living aquatic plants and non-living

debris.
Samples were examined in both living and preserved conditions.
All samples were preserved in five-dram plastic vials in a
6:5:1 solution (water-95% alcohol-formalin) added to the
sample in a one to one volume.

pH readings were taken with a Beckman Pocket pH meter;
this instrument was checked against a different pH kit for
accuracy. The elevation of Mission Well was recorded by
Calvin Ryder (1966), University of Montana, using a Thommen
altimeter.

Each alga collection was examined until no new taxa were
noted; thus some vials were checked more extensively than
others. Camera lucida drawings were made of each taxon en-

countered and measurements were recorded.

5

Most of the other aquatic plants were identified in the
field; in a few instances, specimens were pressed, then
identified in the laboratory. Identifications of these
aquatic plants were based primarily on Steward, Dennis, and

Gilkey (1960). Other references used were: Fassett (1960)

and Fernald (1950).

GENERAL FEATURES OF THE AREAS STUDIED

SOILS

There are currently no soil maps available for the im—
mediate areas concerned. According to J. B. Seago, Soil
Scientist, Polson, Montana, soil maps will probably not be
available for the Mission Well-Tykeson Pond vicinities within
the next fifteen years. Much of the information on this topic
was contributed by this soil scientist. Mr. Seago's contribu-
tion was supplemented by the United States Department of
Agriculture (1960), Soil Survey of Upper Flathead Valley

Area, Montana.

1) Soils in the general vicinity of Tykeson Pond of lower
Swan Valley, Lake County, Montana.

In the immediate vicinity of the pond and lower eleva-
tions to the north and east, Krause gravelly loam is the
major soil. This soil has fewer large stones on the surface
and in the soil than the other Krause soils.

At higher elevations to the west and south from the
pond, Whitefish stony Silt loam is the major soil. This soil

has large stones and boulders on the surface and in the soil.

2) Soils in the general vicinity of Mission Well, Lake

County, Montana.

Holloway stony loam is the major soil. This soil has
developed under coniferous forest in materials of quartzite
and argillite rock origin. The soil profile consists of a
thin (less than two inch) forest mat, a brown iron stained
stony loam upper mineral soil horizon 8 to 24 inches thick
overlaying a light gray, very cobbly eluviated horizon that
extends into fractures of the bedrock. Depth to bedrock

ranges from 40 to more than 72 inches below the soil surface.

The Holloway and Krause soils are classified as Brown
Podzolics. They differ in that the Holloway has a higher
percentage of clay and Silt size particles in the lower soil
horizons. The Holloway has very cobbly loam texture whereas
the Krause has developed in alluvium overlaying outwash.

The Krause series consists of shallow, loamy soils over
loose, coarse materials. The parent material was derived
mainly from gray, green, and reddish argillite, quartzite,
and dolomitic limestone. It contains gravel, cobbles, and
large stones. Krause soils developed under a cover of fir,
lodgepole pine, and spruce and some deciduous Shrubs and
coarse grasses. These soils are excessively drained and have
a very thin, grayish-brown, gravelly loam surface soil and
a yellowish-brown gravelly loam subsoil about one foot thick.
Below are gravelly sands.

The Whitefish soil is classified as Gray Wooded. This

series consists of deep, well-drained, light-colored, silty

soils containing some gravel and underlain by gray, cal-
careous till. These soils have developed from calcareous,
medium-textured, glacial till containing a large percentage
of round gravel, cobbles, and large stones. This material
was derived from gray, green, and reddish argillite, quartz—
ite, and dolomitic limestone. The native vegetation is a
dense forest of ponderosa pine and Douglas-fir, some birch
and aspen, and a scattering of balsam fir and white pine.
These soils have a light-gray to almost white surface soil,
about eight inches thick. The subsoil is a light-brown silty

material with a blocky structure.
GLACIOLOGY

A brief note on glaciers of the Mission Range is dis-
cussed by Alden (1955, p. 111):

From Saint Marys Lake (Tabor Reservoir) in T. 17
N., R. 18 W. in the valley of Dry Creek, southeast of
Saint Ignatius, northward to the mouth of Swan River
near the town of Bigfork, a distance of more than 50
miles, the Western flank of the Mission Range overlooks
the Flathead basin. In most of the northern half of
this extent the western flank of the range rises
abruptly from the eastern shore of Flathead Lake. Dur-
ing the Wisconsin stage of glaciation the great south-
ward-moving Flathead glacier occupied the lake basin
and crowded up along the mountain wall to heights de-
creasing southward from something like 2,000 ft to a
few hundred feet in T. 22 N. Here the Polson terminal
moraine diverges from the mountain front and extends
southwestward to the river below Polson. The Polson
moraine appears to mark the southern limit of the advance
of ice in the Rocky Mountain Trench during the Wisconsin
stage of glaciation. North of this limit small glaciers
on the upper west flank of the Mission Range probably
merged with the marginal ice of the great trunk glacier.
South of the Polson moraine large, separate mountain

glaciers occupied ten or more of the deep gorges that
gash the west flank of the range, and they deposited
noteworthy terminal moraine loops at the foot of the
range. None of these terminal morainal deposits has
been differentiated as of pre-Wisconsin age, and it
therefore seems that the mountain glaciers were fully
as long as the maximum of the last advance as at any
earlier stage.

In another note, Alden (1955, p. 117) discussed the
glaciers of the Mission Range and Swan Range:

East of Lake Blaine and not far south of the point
where the northern front of the Swan Range changes from
a southerly to a southeasterly trend, a projecting spur
ends in a triangular facet. The Swan Range and the
Mission Range stand en échelon and between them for 50
to 60 miles south-southeast is the valley that Swan
River drains northward through Swan Lake and thence
westward to Flathead Lake, through a gap in the hills
near the town of Bigfork. Judging from available non-
topographic maps and from distant views at intervals
from the road near the river, much of the eastern flank
of the Mission Range, like its western flank, especially
the southern half, is gashed by canyons that have been
heavily scoured by mountain glaciers. Apparently the
west flank of the Swan Range also was glaciated, although
less severely. Presumably the glaciers in these several
gorges were tributary to a great branch glacier that
moved northward and joined the Flathead glacier almost
head-on between Bigfork and Lake Blaine. However, though
there is much glacial till along State Route 51 in the
valley of Swan River, no striated ledges or other
evidences were noted to Show that the Swan River glacier
moved northward. About a mile south of the village of
Bigfork, ledges exposed beside the road Show striae made
by the Flathead glacier moving southward.

OBSERVATIONS AND RESULTS
MISSION WELL
PHYSICAL FEATURES

On the Mission Mountain divide, Mission Well (SW-& of
SW i, Section 24, T25N, R19W) lies at an altitude of 5275
feet (1608 meters). On August 5, 1965, the greatest diameter
of the pond from NNW to SSE was approximately 127 meters.
The greatest lengths recorded were approximately 160 meters
from NW to SE and 157 meters from W to E. The greatest depth
recorded on July 26, 1966, was 1.5 meters. Refer to Map III,

page 155.
WATER

Arthur B. Whitney, Fire Control Ranger Assistant at the
Swan Lake District of the Flathead National Forest, took
several borings in 1945 in search of a possible water source
for Mission Well. He found the water body not to be Spring
fed, and the well dug several years ago at the east end re—
ceived its water supply directly from Mission Well itself.
Thus, one would have to assume that water runoff from the
surrounding mountain Sides is the only means by which Mission

Well is replenished. Mission Well is situated far above the

10

water table to receive any supply from this source. If the
water level were ever high enough to overflow, it would drain
in a NW direction toward Bohannon Creek which flows from east
to west.

Sieminska (1965) states the pH of Mission Well during
summer months to be approximately 6.7 (according to infor-
mation provided for her by Dr. R. B. Brunson). At no time
did the author find the pH to be that low. pH, as recorded
for August 5, 1965, and July 26-27, 1966, varied between 7.2-
8.5. Refer to Map III and its legend, pages 152-155.
Undoubtedly, the pH varies throughout the year. According

to Prescott (1962), the algal species Eremosphaera viridis

 

DeBary may be used as an index organism for acid conditions
in which the pH is 6.0-6.8. It is interesting to note that
this species was found in Mission Well on August 5, 1965,

when two pH readings were recorded as 8.1 and 8.5.
VEGETATION (other than algae)

Mission Well is surrounded by towering spruce, the one
exception being the south shoreline. This open exposed area
was logged in 1962, and the log piles were burned in 1965.

Eleven different taxa of mostly higher aquatic plants

were found. Of these Carex rostrata Stokes is the dominant

 

marginal plant and Nuphar variegatum Engelmann is the prominant

 

Species in the more open water. Carex rostrata and Menyanthes

 

 

trifoliata Linnaeus are the dominant Species on the two

 

11

floating mats. For other taxa, refer to Map V and its

legend, pages 156-157.

VEGETATION (algae)

The author recorded 74 genera, 159 Species, and 165 taxa
from Mission Well, excluding desmids and diatoms. Sieminska
(1965) recorded five additional species not found by the
author, thus 144 species and 170 taxa are known. These are

as follows:

DIVISION GENERA SPECIES ALL TAXA
Total % Total % Total %
No. Found No. Found No. Found
CHLOROPHYTA 58 51.5 82 56.9 106 62.5
CHRYSOPHYTA 8 10.8 12 8.5 12 7.1
EUGLENOPHYTA 5 6.8 8 5.6 9 5.5
PYRRHOPHYTA 4 5.4 5 5.5 5 2.9
CYANOPHYTA 19 25.7 57 25.7 58 22.4

Sieminska (1965) recorded 84 taxa of desmids from Mission
Well. The author did not undertake this group of Chlorophyta
since D. C. Jackson, Michigan State University, is currently
working on these from Mission Well. He has thus far recorded
(personal communication) approximately 145 desmid taxa. All
algae considered (except diatoms), approximately 515 different

taxa are known from Mission Well.

12
TYKESON POND
PHYSICAL FEATURES

At the base of the Mission Mountains, Tykeson Pond
(Nw 4 of NW 4, Section 15,_T26N, R19W) lies at elevation
5100-5200 feet (940-970 meters). On August 5, 1965, the
greatest diameter of the pond from S to N was approximately
54 meters. The greatest length recorded was approximately
86 meters from WSW to ENE. The greatest depth recorded on

July 26, 1966, was 2.1 meters. Refer to Map IV, page 155.
WATER

AS in Mission Well, Arthur B. Whitney found no evidence
that Tykeson Pond was Spring fed. It too is replenished by
water rUnoff from the surrounding mountain and hill sides.
This pond is situated high enough above the water table to
receive any supply from this source. If Tykeson Pond were
ever high enough to overflow, it would drain in an easterly
direction towards Loon Lake.

Thegfli, as recorded for July 15, 1965, August 5, 1965,
and August 5, 1965, varied between 7.4-8.2. -Refer to Map

IV and its legend, pages 154-155.
VEGETATION (other than algae)

Tykeson Pond is surrounded primarily by Pinus contorta

Douglas var. murrayana Engelmann (lodgepole pine), Thuyg

 

15

plicata D. Don (western red cedar), Abies grandis Lindley

 

(grand fir), and Larix occidentalis Nuttall (western larch).

 

The northwest shoreline is primarily exposed where the logging
road nears the pond.

Twenty—three different taxa of mostly higher aquatic
plants were found, two other taxa of macrosc0pic algae were
recorded. Refer to Map VI and its legend, pages 158-159.
Potentilla palustris (Linnaeus) Scopoli is the more dominant
plant both along the margin and on the floating mat. Nuphar
variegatum Engelmann is a prominent Species in the more Open
water. Other dominant Species on the floating mat are

Menyanthes trifoliata Linnaeus and Utricularia vulgaris

 

Linnaeus.

VEGETATION (algae)

The author recorded 70 genera, 151 Species, and 140 taxa
from Tykeson Pond, excluding desmids and diatoms. These are

as follows:

DIVISION GENERA SPECIES ALL TAXA
Total % Total % Total %
No. Found No. Found No. Found
CHLOROPHYTA 57 52.9 69 52.7 74 52.9
CHRYSOPHYTA 8 11.4 15 11.5 15 10.7
EUGLENOPHYTA 4 5.7 7 5.5 8 5.7
PYRRHOPHYTA 4 5.7 5 5.8 5 5.6

CYANOPHYTA 17 24.5 55 26.7 58 27.1

14

Dennis C. Jackson, Michigan State University, is currently
working on the desmids from Tykeson Pond. He has thus far
recorded (personal communication) approximately 97 desmid
taxa. All algae considered (except diatoms), approximately
257 different taxa are known from Tykeson Pond.

The author recorded a total of 89 different algal genera,
215 different Species, and 244 different taxa from Mission
Well and Tykeson Pond, excluding desmids and diatoms.
Sieminska (1965) recorded four additional species from
Mission Well not found by the author from either pond. Thus,
219 different species and 248 different taxa are known, of
which eight or 5.2% of the latter are new. Eighty-seven
species and 108 taxa are exclusively in Mission Well, 75
species and 78 taxa are exclusively in Tykeson Pond, and 57
Species and 62 taxa are common to both ponds. These 248 taxa
are discussed in the following section on systematics. For
individual comparisons between the two ponds, refer to

Table I, page 15.

15

TABLE I

COMPARATIVE TABLE OF THE TWO AREAS STUDIED

 

MISSION WELL

TYKESON POND

 

Elevation
Greatest diameter
of pond

Greatest length
of pond

Greatest depth
of pond

pH ranges:
summer months

Aquatic plants
no. of taxa

Algae (excluding desmids)

no. of genera

no. of Species

no. of taxa

no. of new taxa
Algae (including desmids)
no. of desmids

no. of all taxa

5275 feet
(1608 meters)

127 meters

160 meters

1.5 meters

7.2-8.5

11

74

144

170

145

515

5100-5200 feet
(940-970 meters)

54 meters

86 meters

2.1 meters

7.4-8.2

25

70

151

140

97

257

 

SYSTEMATICS

The following is a list of all algae encountered by the

author from both Mission Well and Tykeson Pond. The arrange-

ment of taxa above the generic level follows that of Prescott

(1962).

All taxa below the family level are listed alpha—

betically under the family. Information is included in the

following sequence:

1.

Complete author citation followed by reference,

page number, and year.

Plate and figure numbers for this text.

Reference from which the alga was identified.

Cell dimensions, colony dimensions, etc. (based

upon the author's collections).

This may be followed by a discussion if identification
is questionable or if clarity is needed.

Occurrence (vial number).

16

17
Division Chlorophyta
Class Chlorophyceae
Order Volvocales

It should be noted that few members of this order were
found during this study although one might expect to find
more taxa from such a large group of flagellates in the type

of habitat studied.
Family Volvocaceae

Eudorina Ehrenberg, Phys. Abhandl. Konigl. Akad. Wiss.

.Berlin, 78. 1852a.

Eudorina eleganS Ehrenberg, Phys. Abhandl. Konigl. Akad.

Wiss. Berlin, 78. 1852a.

 

(Pl. XXVIII, Fig. 1)
See Prescott (1962, p. 76).
Cells 8.5-10.0u diam.; colony 57.0u diam.
Tykeson Pond. Collector: D. C. Jackson, coll. no.
2067 and 2081, Michigan State University. It is noteworthy
that this Species was not found in the author's 1965-1966

collections, but was very abundant in 1962 collections.

Pandorina Bory, Dictionnaire d'histoire naturelle, 600.

 

1824.

18

Pandorina morum Bory, Dictionnaire d'histoire naturelle,

 

600. 1824.
(P1. I, Fig. 1)
See Prescott (1962, p. 75).
Cells 12.4-15.9u diam.; 14.5-17.4u long.

Mission Well (A-7; H-22, 25); Tykeson Pond (x-5, B-14).

Volvox Linnaeus, Systema naturae. Regnum animale.

1: 820. 1758.

Volvox tertius A. Meyer, Bot. z, 54: 188. 1896.

 

(Pl. I, Fig. 5)
See Prescott (1962, p. 79).
Cells 5.0-5.7u diam.; colony 502.6u diam.; daughter

colonies 54.8-58.5u diam.

A spherical colony; individual cell sheaths evident;
eight daughter colonies visible.

Tykeson Pond (C-2).

Volvox Sp.
An unidentified Species of Volvox was found in Mission

Well.

Order TetraSporales
Family Palmellaceae

Asterococcus Scherffel, Ber. Deut. Bot. Ges. 26(A): 762.

 

1908.

19

Asterococcus limneticus G. M. Smith, Trans. Wisc. Acad.

 

 

Sci. 19: 627. 1918.

 

(Pl. I, Fig. 6)
See Prescott (1962, p. 86).
Cells 16.5-20.9u diam.; colony 52.5U diam.

Mission Well (G-1); Tykeson Pond (x-2).

Asterococcus superbus (Cienkowski) Scherffel, Ber. Deut.

 

Bot. 925, 26(A): 762. 1908.
(Pl. I, Fig. 5)
See Pascher (1915, Part 5, p. 55).
Cells 27.9u diam.

Tykeson Pond (x-8).

Gloeogystis Naegeli, Gattungen einzelligen Algen,

 

physiologische und systematische bearbeitet, 65. 1849.

Gloeocystis ampla (Kuetzing) Lagerheim, Defy, ggngl.

 

§X¢ Vet.-Akad. Forhandl. 40(2): 65. 1885.
(P1. II, Fig. 4)
See Prescott (1962), p. 84).
Cells 7.0-8.7u diam.; 7.0-10.4u long.
Somewhat globular colonies with unlamellated gelatinous
Ganvelopes; sheaths for each group of cells not confluent,
k>ut distinct and angular from mutual compression.

Mission Well (H-22); Tykeson Pond (x-15).

20

Gloeocystis botryoides (Kuetzing) Naegeli, Gattungen

 

einzelligen Algen, physiologische und systematische
bearbeitet. 1849.
(P1. II, Fig. 5)

See Pascher (1915, Part 5, p. 55).

Cells 5.5 diam., 7.0u long.

According to Pascher(1915),this species is dubious;
however, the specimens found agree with the given description
in Pascher. Cells are usually Spherical, seldom elongate as
in this instance.

Mission Well (H-18); Tykeson Pond (x-15).

Gloeocystis gigas (Kuetzing) Lagerheim, Oefv. Konql.

 

SK, Vet.-Akad. Forhandl. 40(2): 65. 1885.
(P1. I, Fig. 4)

See Prescott (1962, p. 84).

Cells 9.0-12.0u diam.

Colony spherical, usually of eight cells; cells Spherical
or slightly oblong; the colonial mucilage and cell sheaths
regularly lamellate.

Mission Well (H-15); Tykeson Pond (x-2). Previously

reported from Mission Well by Sieminska (1965).

Gloeocystis major Gerneck §x_Lemmermann, Tetrasporales.

 

II) A. Pascher, Die Sfisswasserflora Deutschlands, Oesterreiches
B51Q_der SchweiZ. Heft 5. Chlorgphyceae 2: 55. 1915.

(P1. 11. Fig. 1)

21

See Prescott (1962, p. 84).

Cells 17.8u diam., 21.4u long.

Chloroplast massive; cells surrounded by concentric
layers of mucilage.

Tykeson Pond (x-2).

Gloeocystis planctonica (West & West) Lemmermann, Tetra—

sporales. In A. Pascher, Die Sfisswasserflora Deutschlands,

 

Oesterreiches und der Schweiz. Heft 5. Chlorophyceae 2: 54.
1915.
(Pl. I, Fig. 2)
See Prescott (1962, p. 85).
Cells 7.0u diam.; colony 20.9u diam.
Cells Spherical; three-sided mucilaginous sheath; free-
floating colony.

Mission Well (H-19).

Gloeocystis vesiculosa Naegeli, Gattungen einzelligen

Algen, physiologische und systematische bearbeitet, 66. 1849.
(Pl. II, Fig. 2)

See Prescott (1962, p. 85).

Cells 4.0-6.0u diam.; colony 55.5u diam., 107.1u long.

Colony of an amorphous expanded jelly-like mass with
lamellate mucilage; cells spherical.

Tykeson Pond (x-2). Previously reported from Mission

Well by Sieminska (1965).

22

Palmella Lyngbye, Tentamen Hydrophytologiae Danicae,

 

205. 1819.

Palmella mucosa Kuetzing, Phycologia generalis, oder

 

Anatomie, Physiologie und Systemkunde der Tange, 172. 1845.
(Pl. III, Fig. 6)

See Prescott (1962, p. 85).

Cells 7.0-10.4u diam., 8.0-11.0u long.

Shapeless gelatinous mass, containing many spherical
cells without any order of arrangement; cell sheaths distinct
at first, becoming confluent with colonial mucilage as illus-
trated.

Mission Well (H-11); Tykeson Pond (x-9).

Palmodictyon Kuetzing, Phycologia germanica, Deutschlands

 

Alg§n_ig bfindigen Beschreibungen, 155. 1845.

Palmodictyon varium (Naegeli) Lemmermann, Tetrasporales.

 

In A. Pascher, Die Sfisswasserflora Deutschlands, Oesterreiches

 

und der Schweiz. Heft 5. Chlorophyceae 2: 57. 1915.

 

 

(Pl. III, Fig. 1)
See Prescott (1962, p. 85).
Cells 5.2-7.0u diam., 4.0-5.2u long; filament 12.2-
15.9-(24.0u) diam.
Cells without individual sheaths; cells mostly spherical
(this latter characteristic is very important, for at times,

this species may resemble Radiofilum flavescens G. S. West

 

25

whiCh generally has larger cells mostly broader than long).

Mission Well (H-11).

Sphaerocystis Chodat, Bull. Herb. Boiss., 119. 1897.

 

 

 

Sphaerocystis schroeteri Chodat, Bull. Herb. Boiss.,

 

 

 

119. 1897.
(P1. III, Fig. 5)
See Prescott (1962, p. 85).
Cells 10.5-15.7u diam.; larger daughter colony cells
5.2-5.8u diam.; smaller daughter colony cells 5.0-5.5u diam.
Mission Well (H—6); Tykeson Pond (x-2; B-8, 10, 14;

C-2).

Family Tetrasporaceae

 

 

Schizochlamys A. Braun in Kuetzing, Species algarum, 891.

1849.

Schizochlamys gelatinosa A. Braun in Kuetzing, Spggies
algarum, 891. 1849.
(P1. III, Fig. 2)
See Prescott (1962, p. 90).
Cells 10.4-12.2u diam.; colony 425.0u diam.

Mission Well (H-12).

24

Family Coccomyxaceae

Elakatothrix Wille, Biol. Centralbl., 502. 1898.

 

 

Elakatothrix viridis (Snow) Printz, Mat.-Nat. El.

 

1915(6): 51. 1914.
(P1. III, Figs. 3, 4)
See Prescott (1962, p. 95).
Cells 5.2-7.1u diam., 29.6-58.5u long; colonies 20.9-
51.5u diam., 48.7-75.0u long.
Cells taper to points at both poles, not having one
rounded pole as in E, gelatinosa Wille, 1898.

Mission Well (H-12).

Order Ulotrichales

Family Ulotrichaceae

Radiofilum Schmidle, Flora 78: 47. 1894.

 

Radiofilum conjunctivum Schmidle, Flgrg 78: 48. 1894.

 

(Pl. IV, Fig. 1)
See Prescott (1962, p. 105).
Cells 7.1u diam., 7.1u long; filament 521.4u long.
Cell wall halves evident.

Tykeson Pond (x-5).

Radiofilum flavescens G. S. West, J, B93. 57: 57. 1899.

 

(Pl. Iv, Fig. 2)

25

See Prescott (1962, p. 105).
Cells 6.0u diam., 5.2a long; filament 24.4u diam.
Cells ellipsoid; cell wall halves not apparent.

Mission Well (H-18).
Ulothrix Kuetzing, Flora 16: 517. 1855.

Ulothrix subconstricta G. S. West, J, Bot, 55: 82. 1915.
(P1. Iv, Fig. 3)
See Prescott (1962, p. 96).
Cells 7.0u diam., 15.9-26.1u lbng.
Chloroplast extends through two-thirds of the cell;
cells constricted at the cross walls.

Mission Well (H-18).

Ulothrix subtilissima Rabenhorst, Florae Europaea algarum

aquae dulcis gt submarinae, Alg. Exsic. No. 655, 1868.

 

(Pl. Iv, Fig. 4)
See Prescott (1962, p. 96).
Cells 4.6u diam., 10.7-12.4u long.
Chloroplast nearly extending entire cell length; cells
constricted at the cross walls.

Tykeson Pond (x-5).

Order Microsporales

Family Microsporaceae

Microspora Thuret, Ann. Sci. Nat. Bot. 14(5): 221. 1850.

 

26

Microspora loefgrenii (Nordstedt) Lagerheim, Ber. Deut.
Bot. Egg. 5: 417. 1887.
(P1. IV, Fig. 5)
See Prescott (1962, p. 107).
Cells 15.9u diam., 12.1-15.9u long.
Cells have thick wall-sections; cells short-cylindric,
rectangular; three-fourths to twice the diameter in length.

Mission Well (H-4); Tykeson Pond (x-20).

Microspora pachyderma Lagerheim, Ber. Deut. Bot. Ges.
5: 415. 1887.
(Pl. Iv, Figs. 6, 7)
See Prescott (1962, p. 108).
Cells 7.1-10.4u diam., 14.5-17.4u long.
Cells cylindrical, up to twice the diameter in length;
wall sections evident.

Mission Well (H-4); Tykeson Pond (x-2, 15).

MicrOSpora staqnorum (Kuetzing) Lagerheim, Ber. Deut.

 

Bot. Ges. 5: 417. 1887.
(P1. Iv, Fig. 8)
See Prescott (1962, p. 108).
Cells 8.7a diam., 24.4-58.8u long.
Juncture of wall sections not evident in most cells;
cells three to four times longer than broad; chloroplast a
granular sheet not completely covering the wall. According

to Pascher (1914, Part 5, p. 51), there are no constrictions

27

at the cross walls. According to Prescott (1962, p. 108),
cells are slightly constricted at the cross walls, as seen

in this instance.

Mission Well (A-6).

Microspora tumidula Hazen, Mem. Torrey. Bot. Club 11:

 

 

117. 1902.
(P1. IV, Fig. 9)
See Prescott (1962, p. 108).
Cells 7.1u diam., 8.8-10.7u long.
Cells are slightly constricted at the cross walls;

chloroplast densely granular; cells one to two times as long

as broad.

Mission Well (H-15); Tykeson Pond (x-2).
Order Cylindrocapsales
Family Cylindrocapsaceae

Cylindrocapsa Reinsch, Abhandl. Naturh. Geg, Nfirnberq

 

 

5(1866): 66. 1867.

Cylindrocapsa conferta W. West, J, Roy. Microscop. Soc.,

 

755. 1892.
(P1. V, Fig. 1)
See Prescott (1962, p. 110).

Cells 12.2-15.9u diam., 7.0-12.2u long; filament 15.7-

17.4u diam.

28

Cells short, quadrate to quadrangular-ovate; cells not
as wide as usually found.

Tykeson Pond (B-4).

Cylindrocapsa geminella Wolle, Freshwater algae g: the

 

 

 

g. §., 104. 1887.
(Pl. V, Fig. 2)
See Prescott (1962, p. 110).
Cells 14.5u diam., 21.4u long.

Tykeson Pond (x-2).
Order Chaetophorales
Family Chaetophoraceae

Microthamnion Naegeli in Kuetzing, Species algarum,

 

 

552. 1849a.

 

Microthamnion kuetzingianum Naegeli in Kuetzing, Spggies
glgggum, 552. 1849a.
(Pl. v. Fig. 4)
See Prescott (1962, p. 122).
Cells 4.0u diam., 10.0-15.0u long.
Main axis of the filament soon lost in the ramifications.

Mission Well (G vials).

Microthamnion strictissimum Rabenhorst, Die Algen

 

 

Sachsen's, No. 289. 1859.

 

(Pl. v, Fig. 5)

29

See Prescott (1962, p. 122).

Cells 5.0—5.5u diam., 24.4u long (max. length).

Main axis of the filament is distinct throughout the
thallus.

Mission Well (G vials); Tykeson Pond (x-20).

Protoderma Kuetzing, Phycologia generalis, oder Anatomie,

 

 

 

Physiologie und Systemkunde der Tange, 295. 1845.

 

Protoderma viride Kuetzing, Phycologia generalis, oder

 

 

Anatomie, Physiologie und Systemkunde der Tange, 295. 1845.

 

(Pl. v, Fig. 5)

See Prescott (1962, p. 125).

Cells 7.1u diam. (max.); 10.7u long (max.).

Pseudoparenchymatous disc of horiZontally growing fila-
ments, closely arranged and semiradiate; branches become free
and apparent at margin of thallus; walls thin, without setae;
chloroplast a parietal disc with one pyrenoid.

Attached to filamentous green algae.

Tykeson Pond (x-2).
Family Coleochaetaceae

Chaetosphaeridium Klebahn, Pringsh. Jahrb. Wiss. Bot.

 

 

 

24: 276. 1892.

Chaetosphaeridium pringsheimii ? conferta Klebahn,

 

Pringsh. Jahrb. Wisgi Bot. 24: 307. 1895.

 

50

(Pl. VI, Fig. 1)
See Pascher (1914, Part 6, p. 145).
Cells 10.5u diam.
Because of dimensions and the presence of a short

utricle, this has been identified as g, pringsheimii f.

 

conferta:this form differs from the typical by presence of a
short utricle; cells as originally described, 9.0-12.0u diam.;
this form has cells densely arranged into layers; the form
found is somewhat questionable since only a single cell
appeared.

Epiphytic on Microchaete Sp.

 

Tykeson Pond (x-2).

ChaetOSphaeridium Sp.

 

(Pl. VI, Fig. 2)

Cells 4.7-5.1u diam.; setae 104.5u long (max.).

This species has smaller cells than other described
Species of the genus. The combination of a small cell with
a reticulate parietal chloroplast makes this indeed unusual;
however, there may not be enough valid information to warrant
this as a new taxon Since it was very possible that such
structures as connecting tubes were overlooked at the time
this was observed; chloroplast with a single pyrenoid.

Attached to Mougeotia sp.

 

Tykeson Pond (x-5). (It should also be noted that the

genus Chaetosphaeridium was found in the G vials from Mission

 

Well).

51
Order Oedogoniales
Family Oedogoniaceae

Bulbochaete C. A. Agardh, Synopsis algarum Scandinaviae,
adjecta dispositione universali algarum, XXIX. 1817.

Bulbochaete Sp.

(Pl. VI, Fig. 5)

See Tiffany (1950, p. 28).

Veg. cells 17.4u diam., 58.5u long; oogonium 41.7u diam.,
54.8u long; male cell 10.4u diam., 51.5u long.

Since androspores are not present and the exact position
of the suffultory cells may be difficult to determine, this
illustration may key to any of the following three Species
which have Similar dimensions and characteristics:

B, intermedia: division of suffultory cell infra—
medium - median - supramedian.

B, nordstedii: gynandrosporous; suffultory cell
superior (occasionally submedian).

B, polyandria: idioandrosporous; suffultory cell
superior (rarely submedian).

Mission Well (H-22); the genus also reported from

Tykeson Pond (Q-1).

Oedogonium Link, In C. G. H. Nees von Esenbeck, Horae

physicae berolinenses, 5. 1820.

52

Oedqgonium ambiceps (Jao) Tiffany, N, Amer. Flora 11(1):

 

 

79. 1957.
(P1. VI, Fig. 6)
See Prescott (1962, p. 205).
Veg. cells 9.0-12.0-15.0u diam., 22.0—42.0u long;
oogonia 52.0-58.0u diam., 19.0-55.0u long; OOSpores 19.0-
55.0u diam., 19.0-27.0u long; androsporangia 11.0-15.0u diam.,
4.0u long.
Mission Well (G vials).
Oedogonium Sp.
(Pl. VI, Figs. 4, 5)
Cells 10.4u diam., 58.5u long; oogonia 51.5u diam.,
29.6u long.
Since this Specimen lacked OOSporeS, identification was
not possible.
Tykeson Pond (x-20).
It should be noted that other species of Oedogonium occur
in both Mission Well and Tykeson Pond; however, they did not

have reproductive structures necessary for identification.

Order Chlorococcales

Family Endosphaeraceae

Kentrosphaera Borzi, Studi algolocici 1: 87. 1885.

Kentrosphaera gloeophila (Bohlin) Brunnthaler, Protococ-

caleg, In A. Pa8cher, Die Sfisswasserflora Deutschlands,

55

Oesterreichs und der Schweiz. Heft 5. Chlorophyceae 2: 68.
1915.
(P1. VI, Fig. 7)

See Prescott (1962, p. 214).

Cells 24.4u diam., 51.5u long.

Chloroplast axial, with extensions flattened at the wall
to form irregularly shaped processes. This genus is often
intermingled with other algae, sometimes found in the mucilage
of blue-greens.

Mission Well (H-15, 20).
Family Characeae

Characium A. Braun in Kuetzing, Species algarum, 208.

1849.

Characium coronatum Reinsch, Abhandl. Naturh. Ges.
Nfirnberg 5(1866), 1867.

(P1. VI, Fig. 11)

See Pascher (1915, Part 5, p. 78).

Cell 7.1u diam., 28.6u long (incl. stipe).

The dimensions given slightly exceed those reported in
Pascher (1915). This species very closely resembles B,
ambiguum Herman, 1865, the latter having a much shorter stipe.

Attached to Oedoggnium Sp.

Tykeson Pond (x-2).

 

54

Characium ornithocephalum A. Braun, Algarum unicellu-

larum genera nova vel minus cognita, 42. 1855.
(P1. VI, Fig. 10)

See Pascher (1915, Part 5, p. 80).

Cell 15.5u diam., 52.1u long from cell base to Spine
tip, 24.4u long (excl. stipe and Spine), 48.8u long (from
attaching disc to Spine tip).

The illustration does not Show the usual curvature;
perhaps the position as viewed did not show this feature.

Epiphytic on Scytonema Sp.

Tykeson Pond (x-2).

Characium pringsheimii A. Braun, Algarum unicellularum
genera nova vel minus cognita, 57, 106. 1855.
(P1. VI, Figs. 8, 9)
See Pascher (1915, Part 5, p. 80).

Cells 4.8-7.0u diam., 15.7-17.4u long (without stipe).
Attached to Oedogonium Sp.

Mission Well (H-15); Tykeson Pond (x-20).
Family Hydrodictyaceae

Pediastrum Meyen, Nova Acta Acad. Caes. Leop.-Carol.

 

14: 772. 1829.

Pediastrum araneosum var. rugulosum (G. S. West) G. M.
Smith, Bull. Torrey Bot. Club. 45: 476. 1916.

(P1. VII, Fig. 1)

'1.”

55

See Prescott (1962, p. 222).

Cells 15.7-22.2u diam., 15.9-20.9u long; colony 128.8u
diam. (longest dimen.).

Colonies found were of 52 cells; cell wall with coarse
reticulations; processes of peripheral cells short.

Mission Well (H-12); Tykeson Pond (B-5).

Pediastrum boryanum (Turpin) Meneghini, Linnaea 14: 210.

 

1840.
(P1. VII, Figs. 2-4)
See Prescott (1962, p. 222).
Cells 7.0-15.6u diam., 10.2-17.4u long; colonies 54.8-
42.0-86.9u diam.
Colonies of 8-16-52 cells. Incision of peripheral cells
widely open, cell wall smooth or granulate.

Tykeson Pond (x-1, 8, 9; C-4).

Pediastrum braunii Wartman in Wartman & Schenk, Schweiz.

 

Kryptogamen. EKEAE- 1(52). 1862.
(Pl. VII, Figs. 6, 9)

See Skuja (1964, p. 124) and Pascher (1915, Part 5,
p. 104).

4-celled colonies, cells 14.2-17.4u diam., 10.4-12.2u
long; 8-celled colonies, cells 10.4-15.9u diam., 10.4u long;
16-celled colonies, cells 15.9u diam., 15.9u long.

In eight-celled colonies, cells connected along one-third

their length; small interstices present. As found in the A-9

56

collection, B. braunii has somewhat undulate—warty basal
thickenings where cells are in contact, and there are no
processes in addition to the apical four. This species
closely resembles B, taylori Sieminska, a Species having more
than four processes. Refer to B, taylori, page 57.

Mission Well (A-1, 5, 6, 9; H-4, 24).

Pediastrum duplex var. cohaerens Bohlin, Bih. Kongl.

 

 

 

.By, Bg£.-Akad. Handl. 25, Afd. 5(7): 51. 1897.
(P1. VII, Fig. 7)
See Prescott (1962, p. 224) and Pascher (1915, Part 5,
p. 95).
Cells 10.4u diam., 10.4-12.2u long.
Cells smaller in diameter; this variety differs from
the typical by having granular cell walls.

Tykeson Pond (B-5).

Pediastrum duplex Meyen, Nova Acta Acad. Caes. Leop.-

 

 

 

ngpi, 14: 772. 1829. var. duplex.
(Pl. VII, Fig. 8)
See Prescott (1962, p. 225).
Cells 7.8-9.7u diam., 7.0-9.5u long.; colony 55.0u
diam.
Colony distinctly perforate; lobes of peripheral cells

not bifurcate as in B. biradiatum Meyen.

 

Tykeson Pond (x-8; B-6).

57

Pediastrum obtusum Lucks, Jahrb. Westpr. Lehrevereins

 

Narurk., (reprint), 15. 1907.
(Pl. VIII, Fig. 1)
See Prescott (1962, p. 226).
Cells 8.7-10.4u diam., 7.0-9.1u long; colony 51.5u
diam.
Deep, narrow sinus forming two major lobes; the lobes
incised to.form bluntly rounded lobules.

Tykeson Pond (x-8).

Pediastrum taylori Sieminska, Trans. Amer. Microscop.

 

 

.§QE- 84(1): 100. 1965.

Described as a new Species by Sieminska (1965) from
Mission Well. This species very closely resembles B, braunii
Wartmann morphologically, the latter having four alternate
marginal processes on the peripheral cells. .B. taylori differs
by having additional medium processes both on the peripheral
and on the inner cells of the colony. Very close attention
was given to these two Species by the author. A single colony
of B. taylori was found, this being composed of eight cells.
The dimensions agree with those given by Sieminska (length of
cells with processes 9-17u; breadth 9-16u). A fifth median.
process was detected on two cells, the other six cells appear—
ing to have only four alternate marginal processes as in
‘B. braunii. According to Sieminska, B. taylori has delicate
granules or punctae on the wall of the processes. This latter

marking was not found in the plant observed by the author.

58

It may be very possible that these two taxa are but a single
Species.

Mission Well (H-25).

Pediastrum tetras Ralfs, Ann. Mag. Nat. Hist. 14(1):

 

 

469. 1844. var. tetras.
(Pl. VII, Figs. 5, 10)
See Prescott (1962, p. 227).
Cells 7.1-8.1u diam. and length; colonies of 4-8 cells.
Mission Well (H-5, 22); Tykeson Pond (x-2, 5, 8).

Previously reported from Mission Well by Sieminska (1965).

Pediastrum tricornutum Borge, Bihang. 5g, Svenska Vet.-

 

 

Akad. Handl. 17, Afd. 5(4), 1892. var tricornutum.

 

(Pl. VIII, Fig. 2)
See Pascher (1915, Part 5, p. 104).
Cells 7.0-8.1-10.4u diam., 8.1-10.4u long.; colony
22.6u diam.

Mission Well (H-11, 12).

Sorastrum Spinulosum Naegeli, Gattungen einzelligen Algen,
physiologische und pystematische bearbeitet, 99. 1849.
(P1. VIII, Fig. 5)
See Pascher (1915, Part 5, p. 201).
Cells 10.4u diam., 15.9u diam. (incl. spines), 6.7u thick,
15.9u long (max. length); Spines 5.2u long.
Two Spines per angle.

Tykeson Pond (x-8, B-15).

59

Family Coelastraceae

Coelastrum Naegeli in Kuetzing, Species algarum, 195.

 

 

1849.

Coelastrum cambricum Archer, Quart. B. Microscop, Sci.

 

 

8: 65. 1868. var. cambricum.

 

(Pl. VIII, Fig. 4)
See Pascher (1915, Part 5, p. 195).
Cells 8.7u diam.
There is the remote possibility that this specimen could

be Q. cambricum var. nasutum (Schmidle) G. S. West; however,

 

it is very unclear how this variety differs from the typical.

Mission Well (H-14).

Coelastrum cambricum var. intermedium (Bohlin) G. S.

 

 

 

West, 1°.Llflfl- Soc. Bot. 58: 156. 1907.
(P1. VIII, Figs. 5, 6)
See Pascher (1915, Part 5, p. 195).
Cells 15.9-15-7-17-4u diam.; colonies of 8-16 cells.
Mission Well (H-4, 7, 14, 15, 22; Y-1; Prescott 5 Mon

12, Mich. State Univ.); Tykeson Pond (x-5).

Coelastrum microporum Naegeli in A. Braun, Algarum uni—

 

 

cellularum genera nova minus cognita, 70. 1855.
(P1. VIII, Fig. 7)
See Pascher (1915, Part 5, p. 195).

Cells 9.6-20.9u diam.

40

Intercellular connections of various widths.
Mission Well (A—9, H-22). Previously reported from

Mission Well by Sieminska (1965).

Coelastrum rugulosum Bp..pgy.

(Pl. VIII, Fig. 8)

This new species differs from previously described species
by having cells with wrinkled-like margins and asymmetrically
arranged ribs which are usually not complete; cells Spherical:
17.4-18.7u diam.; a hollow Spherical colony of eight closely
adjoined cells.

'9. rugulosum differs from Enallax coelastroides in having

 

mostly spherical cells. .§° coelastroides has smaller
Scenedesmus-like cells that are longer than wide, 5.0-10.0u
diam. and 15.0-21.0u long; the cells are generally arranged
into a loose colony. Both Species have undulate cell margins

and ribs; however, the ribs of B, coelastroides are more sym-

 

metrical and usually complete. Refer to page 55 for additional
information on B. coelastroides.

Mission Well (H-14).

Family Botryococcaceae

Botryococcus Kuetzing, Species algarum, 892. 1849.

 

Botryococcus braunii Kuetzing, Species algarum, 892.

 

1849.

(P1. VIII, Fig. 9)

41

See Prescott (1962, p. 252).
Cells 5.5-4.0u diam., 5.8-7.2u long.

Mission Well (H-4); Tykeson Pond (x-9, 21; B-15).
Family Oocystaceae

AnkiStrodesmus Corda, Almanach g9 Carlsbad, 196. 1858.

 

Ankistrodesmus falcatus var. acicularis (A. Braun)

G. S. West, A. treatise pp the British freshwater algae, 255.

 

1904.
(P1. IX, Fig. 2)
See Prescott (1962, p. 255).
Cell 2.4u diam., 58.5u long.
Cells solitary and almost straight.

Mission Well (H-17).

Ankistrodesmus falcatus (Corda) Ralfs, The British
Desmidieae, 180. 1848. var. falcatus.
(Pl. IX, Fig. 1)
See Prescott (1962, p. 255).
Cells 2.5-5.0u diam., 59.5-59.1u long.
Mission Well (H-9); Tykeson Pond (x-2). Previously

reported from Mission Well by Sieminska (1965).

Ankistrodesmus fractus (West & West) Brunnthaler,

Protococcales. In A. Pascher, Die Sfisswasserflora Deutsch-

 

_;ands, Oesterreichs und der Schweiz. Heft 5. Chlorophyceae

2: 189. 1915.

42

(Pl. IX, Fig. 5)
See Prescott (1962, p. 254).
Cell 5.0u diam., 52.2u long.

Mission Well (H-4).

Ankistrodesmus Spiralis (Turner) Lemmermann, Arch.

_Hydrobiol. Planktonk. 4: 176. 1908.
(P1. IX, Fig. 4)

See Prescott (1962, p. 254).

Cells 2.5-2.6u diam., 58.5—41.7u long°

Mission Well (A-7; H-7, 11; Y-1).

Dictyosphaerium Naegeli, Species algarum, 72. 1849.

Dictyosphaerium ehrenbergianum Naegeli, Bpecies algarum,

75. 1849.
(Pl. IX, Fig. 5)

See Pascher (1915, Part 5, p. 185) and Prescott (1962,

p. 258).
Cells 5.5-5.7u diam., 5.2-5.8u long.

Cells ellipsoidal or ovoid; colony ovoid; cells slightly

smaller than in the typical.

Mission Well (G-4); Tykeson Pond (x-5).

Dictyosphaerium pulchellum Wood, Smithsonian Contrib.

Knowledge 19: 84. 1874.
(P1. Ix, Fig. 6)

45

See Prescott (1962, p. 258).
Cells 5.5-5.2u diam.
Colony usually globose; cells spherical.

Mission Well (H-8, 14); Tykeson Pond (x-15). Previously

reported from Mission Well by Sieminska (1965).

‘ Eremosphaera DeBary, Untersuchunger fiber die Familie

 

der Conjugaten (Zygnemeen, Desmidieen), 56. 1858.

Eremosphaera viridis DeBary, Untersuchunger fiber die
Familie der Conjugaten (Zygnemeen, Desmidieen), 56. 1858.
(Pl. Ix, Fig. 7)

See Prescott (1962, p. 240).
Cells 156.6-187.7u diam.

Mission Well (H-7, 11, 14).

Kirchneriella Schmidle, Ber. Natur. Ges. Freiburg 7:

85 (double paging). 1895.

Kirchneriella lunaris (Kirchner) Moebius, Abhandl.
.nggh. Natur. Ges. 18: 551. 1894.
(P1. X, Fig. 1)
See Prescott (1962, p. 258). 1
Cells 5.5-4.0u diam., 12.2-15.9u long.
Cells arranged into groups of 4 to 16 cells with strongly
curved crescents with rather obtuse points.

Mission Well (Y-1); Tykeson Pond (B-1).

44

Nephrocytium Naegeli, Gattungen einzelligen Algen,

 

physiologische und gystematische bearbeitet, 79. 1849.

Nephrocytium lunatum W. West, g, Roy. Microscop. Soc.,
756. 1892.
(P1. x, Fig. 4)
See Prescott (1962, p. 249).
Cells 4.0-5.0u diam., 14.5-17.4u long.
Cells lunate; two to three times longer than broad.

Tykeson Pond (x-1, 9).

Nephrocytium obesum West & West, g, Roy. MicrOSCOp, Soc.,

 

15. 1894.
(P1. x, Fig. 2)
See Prescott (1962, p. 249).
Cells 15.9-22.4u diam., 26.1-40.0u long.; colony 48.7u
diam.
Cells one and one—half times longer than broad, one
margin convex, the other straight or concave.

Mission Well (G vials); Tykeson Pond (x-2, 8, 20).

Oocystis Naegeli in A. Braun, Algarum unicellularum

genera nova vel minus cognita, 94. 1855.

Oopystis borgei Snow, REAL: B, B, Fish. Comm. 1902, 579.

 

1905.
(P1. XI, Fig. 1)

See Prescott (1962, p. 245).

45

Cells 10.4u diam., 20.9-22.6u long.

Identified primarily on basis of cell size; chloroplasts
one or as many as four parietal plates; cell walls thin;
cell poles rounded without nodular thickenings.

Tykeson Pond (x-20).

Oopystis crassa Wittrock & Nordstedt, Bot. Notiser, 117.

 

 

1880.
(P1. X, Fig. 5)
See Prescott (1962, p. 245).
Cell 10.7u diam., 19.5u long.
Cells with nodular thickenings at the poles; cells
elliptic; chloroplasts disciform (four to ten); unicellular
or in colonies of two to eight.

Tykeson Pond (x-2).

Oocystis elliptica W. West, B, Roy.Microscop. Soc., 756.

 

1892.
(P1. x, Fig. 8)
See Prescott (1962, p. 244).
Cells 12.2-14.5u diam., 20.9-22.6u long.
Identified on basis of cell size; 10 to 20 small plate—
like chloroplasts; poles of cells without nodular thicken-
ings.

Mission Well (H-16); Tykeson Pond (x-2; B-2).

46

Oocystis lacustris Chodat, Bull. Herb. Boiss. 5: 119,

 

 

296. 1897.
(P1. XI, Fig. 2)
See Prescott (1962, p. 245).
Cells 10.4u diam., 17.4u long; colony 51.5u diam.
Cells one and one-half times longer than wide; both
poles with nodular thickenings; chloroplasts fewer than four.

Mission Well (H-12).

Oogystis ppsilla Hansgirg, Sitz. Kongl. BOhm. Ges. Wiss.

 

 

Math.-Nat. El. Prag., 9. 1890.

 

(Pl. K, Fig. 5)
See Prescott (1962, p. 246).
Cells 5.2-6.8u diam., 8.7-10.5u long; colony 15.9-
(20.9)u diam., 17.4u long.
Identified on basis of small cell size; poles rounded;
chloroplasts one or two.

Mission Well (H-12); Tykeson Pond (x—8).

Oocystis solitaria var. major Wille, Oefv. Kongl. By,

 

Vet.-Akad. Forhandl. 56(5): 26. 1879.

 

(Pl. x, Fig. 6)
See Prescott (1962, p. 247).
Cells 14.5u diam., 28.6u long.
Identified primarily on basis of cell size; both poles
with nodular thickenings; chloroplasts 12 to 25.

Tykeson Pond (x-2).

47

Oocystis submarina Lagerheim, Bot. Notiser, 45. 1886.
(P1. x, Fig. 7)
See Prescott (1962, p. 246).
Cells 7.2u diam., 15.6-16.2u long; colony 24.4u diam.,
41.7u long.
This species closely resembles Q. lacustris. The latter
species has cells one and one-half times longer than broad;

whereas in Q, submarina, cells are two to three times longer

 

than broad and generally much smaller.

Mission Well (H-12).

Quadrigula Printz, Det. Kgl. Norske Vidensk. Selskabs

 

Skrifter, 49. 1915.

Quadrigula chodatii (Tanner-Fulman) G. M. Smith, Wisc.

Geol. Nat. Hist. Surv., Bull. 57: 158. 1920.

 

(Pl. IX, Fig. 8)
See Prescott (1962, p. 260).
Cells 2.6-5.0u diam., 24.4-55.0u long.
Cells tapering to subacute points; chloroplast with a
median notch and two pyrenoids.
Mission Well (H-12); Tykeson Pond (x-7). Previously

reported from Mission Well by Sieminska (1965).

Quadrigula closterioides Printz, Det. Kgl. Norske

'Vidensk. Selskabs Skrifter, 49. 1915.

*

(Pl. IX, Fig. 9)

48

See Prescott (1962, p. 260).

Cells 5.0u diam., 21.4-25.0u long.

Cells taper to Sharply rounded apices, often found in
larger clusters of 8 or 16 cells; chlorOplast with a median
notch and a single pyrenoid.

Mission Well (H vials); Tykeson Pond (x-5).

Quadrigpla lacustris G. M. Smith, Wisc. Geol. Nat. Hist.

 

Surv.,Bull. 57: 159. 1920.

 

(Pl. IX, Fig. 10)
See Prescott (1962, p. 260).
Cells 5.5u diam., 20.9u long.
Colony containing short, fusiform cells; chloroplast
with a single pyrenoid and lacking a median notch.
Mission Well (H Vials); Tykeson Pond (x-7). Previously

reported from Mission Well by Sieminska (1965).

Tetraédron Kuetzing, Phycologia germanica, Deutschlands

 

Algen gp'bUndigen Beschreibungen, 129. 1845.

Tetraédron caudatum (Corda) Hansgirg, Hedwigia 27: 151.
1888. var. caudatum.
(Pl. XI, Fig. 9)
See Prescott (1962, p. 265).
Cell 8.7u diam.; spines 1.5g long (max.).
Cell five-angled, each process ending in a spine.

Mission Well (H-22).

49

Tetraédron enorme var. aequisectum Reinsch, Bennett B.

 

Microscop. Soc. 6. 1888.
(P1. XI, Fig. 5)

See Pascher (1915, Part 5, p. 155).

Cell 20.9u diam.

Cell slightly smaller than in the typical; according to
Pascher (1915), cells 25.0-45.0u diam. Cell symmetrical,
through an isthmus parted into two similar halves, sides are
deeply pouched, ends parted into numerous processes which
bear two spines on the ends.

Mission Well (H-6).

Tetraédron enorme f. minor Reinsch, Bennett g, Microscop.

(Pl. XI, Fig. 6)
See Pascher (1915, Part 5, p. 155) and Prescott (1962,
p. 265).
Cell 27.8u diam.
Twenty to 50 processes; cells 16.0u through the middle,
51.0u with processes.
Mission Well (H-22). Previously reported from Mission

Well by Sieminska (1965).

Tetraédron minimum (A. Braun) Hansgirg, Hedwigia 27:
151. 1888. var minimum.
(Pl. XI, Figs. 5, 4)

See Prescott (1962, p. 267).

50

Cells 5.4-6.1u diam.
Identified on basis of smooth walls and quadrangular

cells.
Tykeson Pond (x-8). Previously reported from Mission

Well by Sieminska (1965).

Tetraédron planctonicum G. M. Smith, Bull. Torrey Bot.

 

 

Club 45: 479. 1916. f. planctonicum.

 

(Pl. XXVIII, Fig. 4)
See Smith (1920, p. 125) and Prescott (1962, p. 268).
Cell 25.0u diam. (without processes), 55.0u diam. (with
processes).
Processes Shorter than the diameter of the cell.

Tykeson Pond (Q-1).

Tetraédron planctonicum f. polyfurcatum forma nov.

 

(Pl. XXVIII, Fig. 6)
Cell 22.0u diam. (without processes), 49.0u diam. (with
processes).
A form differing from the typical by having the angles
produced into many furcate processes.

Tykeson Pond (Q-1).

Tetraédron regulare var. granulata Prescott, Farlowia 1:

 

 

(359. 1944.
(Pl. XI, Fig. 7)

See Prescott (1962, p. 269).

51

Cells 55.0-51.8u diam.

Tykeson Pond (C vials).

Tetraédron starmachii Sieminska, Trans. Amer. Microscop.

 

 

 

Soc. 84(1): 105. 1965.
Previously reported from Mission Well by Sieminska

(1965); not found in the author's 1965-1966 collections.

Tetraédron trigonum Hansgirg, Hedwigia 27: 150. 1888a
(Pl. XI, Fig. 25)

See Pascher (1915, Part 5, p. 149) and Prescott (1962,
p. 270).

Cell 19.5u diam. (through middle), 45.0u diam. (spine
to Spine).

Cell margins convex; sides of the cell body concave or
straight.

Tykeson Pond (x-2).

Tetraédron trilobulatum (Reinsch) Hansgirg, Hedwigia

 

1888, 18. 1889.
(Pl. XI, Fig. 8)
See Pascher (1915, Part 5, p. 146); incorrectly given

as T, trilobatum.

 

Cell 17.8u diam. (pole to pole).
Cell walls smooth; cells triangular; sides more deeply
(:renate than in a very similar Species, T, muticum.

Tykeson Pond (x-2).

52

Trochiscia Kuetzing, Linnaea 8: 592. 1855b.

 

Trochiscia prescottii Sieminska, Trans. Amer. Microscop.

 

fig. 84(1): 101. 1965.
(P1. XI, Figs. 16, 17)

See Sieminska (1965, p. 101).

Cells 15.1—17.4u diam.

As described, cells 8.0-26.0u diam.; cells spherical;
internal cell membrane ornamented with straight or curved
ridges forming a reticulum and with irregular pits varying
in shape and Size.

Mission Well (H-22). Previously reported from Mission

Well by Sieminska (1965).

Trochiscia reticularis (Reinsch) Hansgirg, Hedwigia 27:

 

129. 1888.
(P1. XI, Fig. 22)
See Prescott (1962, p. 259).
Cell 54.8u diam.
There may be as many as 55 visible areas on the cell
wall.

Tykeson Pond (x-8).

Zoochlorella Brandt, Arch.Anat. Physiol. Abth. 1: 140.

 

1882.

Zoochlorella parasitica Brandt, Arch.Anat. Physiol.

 

 

Aflbth. 1: 140. 1882.

 

55

(Pl. XI, Fig. 21)
See Prescott (1962, p. 255).
Cells 1.5-5.0u diam.
Endozoic within the sponge, Spongilla Sp.; chloroplast
one (rarely two).

Tykeson Pond (C vials).
Family Scenedesmaceae

Actinastrum Lagerheim, Oefv. Kopgl. By, Vet.-Akad. FOr-

handl. 59(2): 70. 1882.

Actinastrum hantzschii var. fluviatile Schroeder, Forsch.
Biol. Stat. PlOn 7: 20. 1899.
(P1. XI, Fig. 20)
See Prescott (1962, p. 282).
Cells 5.5-5.5u diam., 59.0 - 42.0u long.

Mission Well (G vials).

CrUcigenia Morren, App. Sci. Nat. Bot. 20(1): 404, 415.

 

1850.

Crucigenia apiculata (Lemmermann) Schmidle, Allg. Bot.
.g. 6: 254. 1901a.
(Pl. XI, Fig. 10)
See Prescott (1962, p. 285).
Cells 5.5-4.0u diam., 5.8-6.9u long; colony 7.0u diam.,

1Jl.6u long.

54

Cells with an apiculation on outer free wall and at
cell base.

Mission Well (H-5, 18, 22).

Crucigenia quadrata Morren, Ann. Sci. Nat. Bot. 20(1):

 

 

415, 426. 1850.
(P1. XI, Figs. 14, 15)
See Prescott (1962, p. 285).
Cells 3.5-5.5n diam., 5.6-4.0u long.

Tykeson Pond (x-5, 19).

Crucigenia rectangularis (A. Braun) Gay, Recherches sur

l§_developpement pp.l§_classification gg_quelques algues verts,

 

100. 1891.
(P1. XI, Fig. 11)

See Prescott (1962, p. 285).

Cells 5.5-5.7u diam., 4.6-6.8u long.

Cells regularly arranged into quartets. This Species
is very closely related to B. irregularis Wille. In the
latter Species, cells are generally larger and irregularly
arranged within the colony, some in four's.

Mission Well (H-15).

Crucigenia tetrapedia (Kirchner) West & West, Trans.

 

Roy. Irish Acad. 52(B): 62. 1902.

 

(Pl. XI, Fig. 12)

See Prescott (1962, p. 285).

55

Cells 5.8u diam., 5.5u long.

Mission Well (H—22).

Enallax Pascher, Beih. Bot. Centralbl. 62. 185. 1945.

 

 

Enallax coelastroides (Bohlin) Skuja, Nova Acta Reg.

 

.Bpg. Sci. Upsal. 18(5): 159. 1964.
(P1. XI, Fig. 15)
(Pl. XII, Fig. 4)
(Pl. XXVIII, Figs. 2, 5, 7-9)

See Skuja (1964, p. 159).

In 4-celled colonies, cells 6.2-12.2u diam., 15.4-
24.5u long; in 8-celled colonies, cells 7.0-8.7u diam.,
10.4-15.9u long.

The pronounced widely spindle-shaped cells are firmly
adjoined; there is a tendency to build a more rounded
cenobium as the number of cells increase. It should be men-
tioned that perhaps Enallax stands somewhere between the

genera Coelastrum and Scenedesmus morphologically. The

 

 

basionym is Scenedesmus costatus var. coelastroides Bohlin,

 

1895, p. 42, later Coelastrum bohlini Schmidle & Senn, 1900,

 

and presently considered Enallax coelastroides.
Mission Well (H-15, 25). This is the first record of

the genus for all of North America.

Scenedesmus Meyen, Nova Acta Acad. Caes. Leop.-Carol.

 

 

1J4: 774. 1829.

56

The genus Scenedesmus warrants Special discussion be-

 

cause of its great abundance and morphological peculiarities.
Twenty-two species and 40 different taxa of this genus were
found, representing approximately one-sixth of all taxa
identified during this study. Of these 40, five are reported
as new taxa. Thirty-seven different taxa were reported from
Mission Well, and within a single vial, H-18, 15 different
taxa were found. The plants identified in vial H-18 were
living upon a submerged Spruce branch, Picea sp., in the form
of a rather loose green mat covering the needles; These 15
have been designated with an asterisk to indicate closely
related taxa within a Single community. All seven reported

subspecific taxa of Scenedesmus armatus Chodat were found in

 

this Single vial. Six of the nine taXa appearing in Tykeson
Pond were also reported from Mission Well, thus only three
different taxa appear in Tykeson Pond which were not found in

Mission Well.

*Scenedesmus acutiformis Schroeder, Die Algen der

 

Versuchsteiche des Schles. Fischervereins gp_Trachenberg.

 

Forschungsberichte, PlOn 5: 45. 1897. var. acutiformis.

 

(Pl. XI, Figs. 18, 19)
(Pl. XII, Figs. 1-3)
See Uherkovich (1966, p. 65, figs. 502-506).
In 2-celled colonies, cells 4.4u diam., 15.2u long; in
4-celled colonies, cells 4.7-5.2u diam., 10.7-17.4u long;

in 8-celled colonies, cells 7.0u diam., 17.4—19.1u long.

57

All cells with complete ribs.
Mission Well (H-6, 18, 22); Tykeson Pond (x-7).

Previously reported from Mission Well by Sieminska (1965).

Scenedesmus acutus Meyen, Nova Acta Acad. Caes. Leop.-

 

.§2£Ql- 14: 775. 1829. var. acutus f. acutus.
(Pl. XII, Figs. 5, 6)
See Uherkovich (1966, p. 56, figs. 1-8).
Cells 5.8-5.2u diam., 15.9-15.7u long.

Mission Well (H-1, 4, 20).

Scenedesmus acutus f. costulatus Uherkovich, Die Scene-

 

desmus—Arten Ungarns, 59. 1966.

 

(Pl. XII, Fig. 7)
See Uherkovich (1966, p. 59, figs. 25-50, 55).
Cells 5.5u diam., 10.4u long.
Differentiated primarily on the basis of the loose
arrangement of the cells into two rows.

Mission Well (H-4).

*Scenedesmus gpiculatus (West & West) Chodat, Scenedesmus,

 

169. 1926.
(P1. XII, Figs. 8, 9)
See Uherkovich (1966, p. 61, figs. 248-252).
Cells 5.2-7.0u diam., 10.4-15.9u long.

Mission Well (A-2; H-14, 18).

58

Scenedesmus arcuatus Lemmermann, Das Phytoplankton sach-
sischer Teiche. Forschungsberichte, PlOn. 7: 112. 1899. var.
arcuatus.

(Pl. XII, Fig. 15)

See Uherkovich (1966, p. 48, figs. 158-145).

Cells 7.0-10.4u diam., 15.9-17.4u long.

It has been suggested by Pascher (1945, p. 195), that
perhaps this taxon Should be assigned to the genus, Enallax.
.Mission Well (H-25); Tykeson Pond (B-15). Previously reported

from Mission Well by Sieminska (1965).

 

Scenedesmus arcuatus var. capitatus G. M. Smith, EEEEE-
Wisc. Acad. Sci. 19: 657. 1918.
(P1. XII, Fig. 17)
See Uherkovich (1966, p. 49, figs. 149-151).
Cells 7.0-8.7u diam., 11.6u long.
It has been suggested by Pascher (1945, pp. 192-95),

that perhaps this variety should be assigned to the genus,

Enallax.

Mission Well (H-25).

*Scenedesmus armatus Chodat, Monographie d‘algues pp
culture pure. Matériaux pour las flore cryptogamique Suisse.
4: 215. 1915. var. armatus.

(Pl. XII, Figs. 10, 11)

See Uherkovich (1966, p. 67, figs. 516—525).

59

Cells 5.5-4.5u diam., 10.4-17.4u long; spines 5.5-7.60
long.

Spines do not approach cell length in the organisms
studied.

Mission Well (A-7; H-18, 20).

*Scenedesmus armatus var. bicaudatus (Guilielmetti-
Printz) Chodat, Scenedesmus) 204. 1926. f. bicaudatus.
(Pl. XII, Fig. 12)
See Uherkovich (1966, p. 69, figs. 548-555).
Cells 5.2u diam., 15.2-15.7u long; spines 5.7-4.0u long.

Mission Well (H-18).

*Scenedesmus armatus var. boglariensis f. bicaudatus
Hortobagyi, Hidrol. Kozl. 29: 504-505. 1949.
(Pl. XII, Fig. 14)
See Uherkovich (1966, p. 68, figs. 556-541).
Cells 5.5u diam., 9.1-10.4u long; spines 4.6-5.2u long.
This differs from the typical through the diagonal spine
position of the bicaudate-type.

Mission Well (H-18).

*Scenedesmus armatus var. boglariensis Hortobagyi, Appgl.
Blpl, Tihany 15: 75-127. 1945. f. boglariensis.
(Pl. XII, Fig. 15)
See Uherkovich (1966, p. 67, figs. 527-554).
Cells 5.5-6.1u diam., 10.4-14.5u long; Spines 5.2-7.0u long.

Mission Well (H-18).

60

*Scenedesmus armatus var. boglariensis f. multispinosus

forma nov.

 

(Pl. XII, Fig. 16)

Cells 5.20 diam., 15.9u long; spines 4.5u long (max.
length).

A form differing from the typical by having additional
spines scattered over the surface of the outer two cells,
none of which are as long as those on the poles of the outer
cells.

Mission Well (H-18).

*Scenedesmus armatus var. boglariensis f. semicostatus

 

 

Hortobagyi, Hidrol. Kozl. 29: 504-505. 1949.

 

(Pl. XII, Figs. 18, 19)
See Uherkovich (1966, p. 68, figs. 542-547).
Cells 4.5-7.0u diam., 10.4-15.7u long; Spines 5.8u long
(max. length).
The Specimens found had dimensions exceeding those re-
corded for this taxon. It differs from the typical by having
complete ribs on the inner two cells only.

Mission Well (H-18).

*Scenedesmus armatus var. microspinosus var. nov.
(Pl. XIII, Fig. 4)
Cells 5.9-4.5u diam., 12.2-15.9u long; spine-like teeth

1.5-2.0u long.

61

This variety differs from the typical by lacking Spines
of cell length and by having two or three Spine-like teeth on
both poles of the outer cells. One should refer to P1. XII,
Figs. 10, 11, to compare the typical with this variety.

Mission Well (H-18).

Scenedesmus brasiliensis Bohlin, Bih. Kongl. By.‘Vet.-

Akad. Handl., 25, Afd. 5(7): 22. 1897. var. brasiliensis.

 

(Pl. XII, Fig. 20)
See Uherkovich (1966, p. 77, figs. 441-444).
Cells 5.8-4.5u diam., 15.9-17.4u long; colonies of
2-4-8 cells.

Mission Well (A-6, 7; H-14, 22, 25); Tykeson Pond (x—8).

Scenedesmus brevispina (G. M. Smith) Chodat, Scenedesmus,

 

 

187. 1926. var. brevispina.

 

(Pl. XII, Figs. 22, 25)
See Uherkovich (1966, pp. 51, 52, figs. 171-177).
Cells 5.2-7.0u diam., 10.4-15.9u long; spines 1.0-2.5u
long.
.This is differentiated on rubustness of cells and short
spines.

Mission Well (H-22).

Scenedesmus decorus var. bicaudato-gpanulatus (Hortobagyi)

 

Uherkovich, Die ScenedeSmus-Arten Ungarns, 105. 1966.

 

(Pl. XII, Fig. 21)

See Uherkovich (1966, p. 105, figs. 688-694).

62

Cells 5.5u diam., 12.2-15.9u long.

Mission Well (H-20).

*Scenedesmus denticulatus var. linearis Hansgirg,
Prodromus der Algenflora von BOhmen. 1: 268. 1886. f.
linearis.

(Pl. XII, Figs. 24, 25)

See Uherkovich (1966, p. 55, figs. 187-196).

Cells 5.5-4.2u diam., 9.5-14.2u long.

Mostly one or two teeth on each pole, seldom three.

Mission Well (H-18, 22); Tykeson Pond (x-8). Previously

reported from Mission Well by Sieminska (1965).

Scenedesmus denticulatus var. linearis f. costatus forma

 

ppy.
(P1. XIII, Fig. 1)

Cells 4.4u diam., 15.9-17.4u long.

This form differs from the typical by having long complete
ribs over the surface of all cells. There are usually two
teeth on the poles of the inner cells and a single tooth on
the poles of the outer cells. This new taxon is very closely

related to S. denticulatus var. linearis f. semicostatus

 

 

(Hortobagyi) Uherkovich, 1966, p. 55, the latter having long
complete ribs over the surface of the inner cells only.

Tykeson Pond (x-20).

Scenedesmus denticulatus var. linearis f. perigranulatus

 

 

(Hortobagyi) Hoham, nom. nov., based on B, brevispina f.

 

65

granulatus Hortobagyi, B, Tud, Akad. Biol. Csop, KOzl. 5:

 

 

 

 

211-245. 1959, non B, denticulatus var. linearis f. granu-

 

.igppgiHortobagyi.
(Pl. XIII, Fig. 2)

See Uherkovich (1966, p. 52, fig. 179).

Cells 4.5u diam., 15.9-14.8u long.

This form differs from the typical by having cells with
granules only on the outer margin of the cell; in addition,
one or two wart-like granules appear adjacent to the teeth
on the outer cells. Uherkovich (1966, p. 52) suggests that

this form Should be transferred eventually to B, denticulatus.

 

This form is more characteristic of the latter species than
of the one which it had been assigned to by Hortobagyi (1959),

thus it has been reassigned to B, denticulatus var. linearis.

 

 

The form name granulatus cannot be retained since it has been

 

used already for those forms having granules covering the
entire cell surface.

Mission Well (H-9)-

Scenedesmus denticulatus var. polydenticulatus Hortobagyi,

 

 

Nova Hedwigia 1: 551. 1960.

 

(Pl. XIII, Fig. 3)
See Uherkovich (1966, p. 55, figs. 210, 211).
Cells 5.5u diam., 8.7u long.
This variety differs from the var. denticulatus through
the great number of teeth and the somewhat loose construction
of the cenobium.

Mission Well (A-7).

64

Scenedesmus ecornis var. disciformis Chodat, Algues

 

 

,vertes ggulg Suisse, Fig. 87. 1902. f. disciformis.

 

(Pl. XIII, Fig. 5)
See Uherkovich (1966, p. 46, figs. 110-121).
Cells 5.5u diam., inner cells 7.0u long, end cells 8.7u
long.

Tykeson Pond (x—8).

*Scenedesmus ecornis Chodat, Scenedesmus, 170. 1926.

 

var. ecornis.
(Pl. XIII, Figs. 6-8)
See Uherkovich (1966, p. 45, figs. 84-109).
Cells 5.5-5.2u diam., 7.1-17.4u long.
Mission Well (H-17, 18); Tykeson Pond (x-2, 4, 8, 21).

Previously reported from Mission Well by Sieminska (1965).

Scenedesmus granulatus West & West, B, Roy, Microscop.

 

 

 

Soc., 500. 1897, f. granulatus.

 

(Pl. XIII, Fig. 10)
See Uherkovich (1966, p. 62, figs. 254-282).
Cells 5.7u diam., 10.4u long.

Mission Well (H—20).

Scenedesmus indianensis Sieminska, Trans. Amer. Microscop.
Soc. 84(1): 105. 1965.
Previously reported from Mission Well by Sieminska (1965);

not found in the author‘s 1965-1966 collections.

65

Scenedesmus‘intermedius var. acaudatus Hortobagyi,

 

Annal. Biol. Tihany 15: 75-127. 1945. f. acaudatus.

 

(Pl. XIII, Figs. 9, 12)
See Uherkovich (1966, p. 95, figs. 605-615).
Cells 2.6-5.5u diam., 6.1-8.7u long.

Mission Well (H-4, 17, 25).

Scenedesmus oahunensis var. montanensis Sieminska,

 

Trans. Amer. Microscop. Soc. 84(1): 106. 1965.
Previously reported from Mission Well by Sieminska

(1965); not found in the author's 1965-1966 collections.

*Scenedesmus opoliensis Richter, B, angew. Mikroskop.

 

 

1: 7. 1896. var. ppoliensis f. opoliensis.

 

 

(Pl. XIII, Fig. 11)
See Uherkovich (1966, p. 96, figs. 618-650).
Cells 5.5-5.5u diam., 8.7-17.4u long; Spines 7.6u long
(max. length).

Mission Well (H-18, 24).

Scenedesmus ovalternus Chodat, Scenedesmus, 164-165.

 

 

1926. var. ovalternus.

 

(Pl. XIII, Figs. 15—15)
See Uherkovich (1966, p. 48, figs. 152-156).
Cells 6.5-8.6u diam., 10.2-14.8u long.
Mission Well (H-4, 7, 14, 18, 22); Tykeson Pond (x-2,

7, 20).

66

*Scenedesmus qpadricauda var. longispina (Chodat) G. M.
Smith, Bull. Torrey Bot. BlpB 45: 480. 1916. f. longispina.
(Pl. XIII, Fig. 18)
See Uherkovich (1966, p. 80, figs. 465-468).
Cells 2.6u diam., 7.2u long; Spines 5.2-6.0u long.

Mission Well (H-18).

Scenedesmus guadricauda var. maximus West & West, IEEEE:

Linn. Soc. London 2(5): 85. 1895a.
(Pl. XIV, Fig. 5)

See Uherkovich (1966, p. 80, figs. 461, 462).

Cells 8.7-10.4u diam., 24.4-27.8u long; Spines 12.2-
19.1u long.

As described, spines are approximately the length of
the cell; four-fifths cell length in the author's collections.

Mission Well (H-5, 9, 22).

Scenedesmus guadricauda (Turpin) Brébisson, Mem. Soc.

Acad. Falsise, 66. 1855. var. guadricauda f. guadricauda.

 

(Pl. XIV, Fig. 9)
See Uherkovich (1966, p. 78, figs. 446-460).
Cells 5.2u diam., 17.4-19.1u long; Spines 15.7-17.4u
long.

Mission Well (H-12).

Scenedesmus guadricauda var. gpadrispina ? f. granulatus
(Hortobagyi) Uherkovich, Die Scenedesmus-Arten Ungarns, 84.

1966.

67

(Pl. XIII, Fig. 21)
See Uherkovich (1966, p. 84, figs. 505, 504).
Cells 5.5u diam., 12.2u long; spines 5.5-7.0u long.
This form differs from the typical by having some warts
on the ends of the cells or scattered over the surface.

Mission Well (A-9).

Scenedesmus guadricauda var. semiSpinosus var. nov.

 

(Pl. XIII, Figs. 16, 17)
Cells 5.7u diam., 10.4u long; Spines two-thirds cell
length.
This variety differs from the typical by having on the
face of each cell, an additional Spine. These spines occur
on only one side of the cenobium.

Mission Well (A-10).

Scenedesmus serratus (Corda) Bohlin, Bihang_till. B.

 

Ver. Akad. Handl. 24: 44. 1902. f. serratus.

 

(Pl. XIII, Figs. 22, 25)

See Uherkovich (1966, p. 66, figs. 515, 514).

Cells 5.5-4.5u diam., 12.2-15.9u long.

The typical may be very difficult to separate from the
dubious existing form B. serratus f. meg£_Chodat 1926, p.
195. The latter "differs" from the typical by having smaller
cells: 8.8-12.0u x 2.7-5.5u; whereas the typical has cells
measuring: 15.0-20.0u x 4.0-7.0u. Since species of

Scenedesmus do exist in juvenile stages, it would be logical

 

68

therefore to assume these two forms to be but a single taxon.
It Should be further noted that the measurements recorded
for these plants in the author‘s collection are intermediate
to those listed for the two forms.

Mission Well (H-14, 19; G-1).

Scenedesmus spinosus var. semiSpinosus var. nov.

 

 

(Pl. XIII, Fig. 19)
Cells 5.0u diam., 8.1u long.
This variety differs from the typical by having on the
face of the inner cells, an additional Spine. These spines
occur on both sides of the cenobium.

Mission Well (A-7).

Scenedesmus spinosus Chodat, MonOgraphie d‘algues pp

 

culture pure. Matériaux pour ii flore cryptoggmique Suisse

 

4: 74. 1915. var. Spinosus.
(Pl. XIII. Figs. 24—26)
See Uherkovich (1966, p. 107, figs. 709-750).
Cells 5.1-5.7u diam., 10.4-15.7u long; on outer cells,
Spines 5.7-7.0u long; on inner cells, spines 5.50 long.

Mission Well (A-7; H-6, 19).

Scenedesmus subspicatus var. brevicauda (G. M. Smith)

 

Chodat, Scenedesmus, 222-225. 1926.
(P1. XIII, Fig. 20)
See Uherkovich (1966, p. 110, figs. 776, 777).

Cells 2.4u diam., 6.6-7.0u long; Spines 1.7-5.5u long.

69

This variety is distinguished from the typical by having
cells of shorter length and somewhat Shorter Spines.

Mission Well (H-6).

Scenedesmus tibicensis Uherkovich, Acta Bot. Acad. Sci.
gflpyl. 6: 405-426. 1960.
(P1. XIV, Fig. 8)
See Uherkovich (1966, p. 50, figs. 156-159).
Cells 5.2-5.8u diam., 12.2-12.8u long.
This Species is differentiated by the morphology of the
end cells of the cenobium.

Mission Well (H-17).

Scenedesmus sp.
(Pl. XIV, Fig. 1)
Cells 2.6u diam., 7.0u long.
This possibly illustrates a growth form or deformity;
the colony bearing a single spine.

Tykeson Pond (x-21).

Scenedesmus Sp.

 

(Pl. XIV, Fig. 2)
Cells 5.5n diam., 12.2-15.9u long.
This possibly illustrates a growth form or deformity;
the colony bearing a single spine.

Mission Well (H-20).

70

Tetradesmus G. M. Smith, Bull. Torrey Bot. Club 40:

76. 1915.

Tetradesmus wisconsinense G. M. Smith, Bull. Torrey

Bot. Club 40: 76. 1915.

 

(Pl. XIV, Figs. 4-7)

See Smith (1920, p. 150) and Prescott (1962, p. 285).

Cells 5.0-4.6u diam., 15.7-22.6u long.

Cells longer than those in the typical; cells in two
planes with two cells in each plane and joined along the
long axes when the colony is viewed from the side; cells in
end View spherical, the cells arranged in a quadrangle.

Mission Well (A-7, H-15, 22). Previously reported from

Mission Well by Sieminska (1965).
Order Zygnematales
Family Zygnemataceae

Mougeotia C. A. Agardh, Systema algarum 1: 85. 1824.

 

Mougeotia genuflexa (Dillwyn) C. A. Agardh, Systema

algarum, 1: 85. 1824.
(Pl. XIV, Fig. 15)

See Randhawa (1959, p. 152) and Prescott (1962, p. 501).

Cells 55.7u diam., 106.4u long; zygospores 55.7u diam.

Differentiated on basis of cell diameter; cell length;
lateral conjugation; quadrately-ovate brown zngSpore (50.0-
40.0u diam.) with a smooth wall; zygospore formed wholly in

conjugation tube.

71

Tykeson Pond (vial x-19). It should be noted that other

species of Mougeotia occur in both Mission Well and Tykeson

 

Pond, but they lacked reproductive structures necessary for

identification.

Mougeotiopsis Palla, Ber. Deut. Bot. Ges. 12: 228. 1894.

 

Mougeotiopsis calospora Palla, Ber. Deut. Bot. Ges. 12:

 

228. 1894.
(Pl. XIV, Fig. 10)
See Skuja (1929, p. 45) and Transeau (1951, pp. 75-74).
Veg. cells 10.0-18.0u diam.; 10.0-70.0u long.
Differentiated by absence of pyrenoids, presence of oil
droplets, and a thick-edged chromatophore.
Tykeson Pond (collected by Algae Class, Univ. Mont. Biol.

Stat., July 15, 1966).

Bpirogyra Link, In C. G. H. Nees von Esenbeck, Horae

physicae berolinenses, 5. 1820.

Bpirogyra communis (Hassall) Kuetzing, Bpecies algarum,

 

459. 1849.
(P1. XIV, Fig. 12)
See Randhawa (1959, p. 295) and Prescott (1962, p. 512).
Veg. cells 19.0u diam., 104.2u long; zygospores 20.9-
22.6u diam., 51.5-45.2u long.

Tykeson Pond (C-1). Other Species of Bpirogyra occur in

 

both Mission Well and Tykeson Pond, but they lacked repro-

ductive structures necessary for their identification.

72

Zygnema C. A. Agardh, Systema algarum 1: 77. 1824.

 

Zygnema spp.

Species of Zygnema occur in both Mission Well and
Tykeson Pond; however, identifications were not possible

since reproductive structures were absent.

Zygogonium Kuetzing, Phycologia generalis, oder Anatomie,

 

Physiolpgie und Bystemkunde der Tange, 280. 1845.

Zygogonium ericetorum Kuetzing, Phycologia gprmanica,
_ Deutschlands Algen in bundigen Beschreibungpn, 224. 1845.

var. ericetorum.

 

(Pl. XIV, Fig. 11)
See Prescott (1962, p. 529).
Veg. cells 28.6u diam. (incl. membrane), 52.1-59.5u
long.
Vegetative cells one to four times longer than broad,
often more or less swollen; membrane firm, often lamellated.

Tykeson Pond (x-5).

75

Division ChrySOphyta

Class Xanthophyceae

Order Rhizochloridales

Family Stipitococcaceae

Stipitococcus West & West, B, Bot. 56: 556. 1898.

 

Stipitococcus vasiformis Tiffany, The plankton algge

 

 

__B the west end pB_Lake Erie, 52. 1954.

 

 

(Pl. XV, Fig. 1)

See Rabenhorst (1959, Vol. 11, p. 1062).

Loricas 4.5-7.0u diam., 8.0-15.0u long.

Stipes shorter than body length; chromatOphore one;'
lorica ellipsoid to subglobose; neck with subparallel-
parallel margins; apical Opening not enlarged to slightly
enlarged.

Epiphytic on Mougpotia Sp.

 

Tykeson Pond (Q-1).
Order Heterococcales
Family Gloeobotrydaceae

Chlorobotrys Bohlin, Borzi. Bih. Kongl. By. Bet.-Akad.

 

 

 

 

Handl. 27, Afd. 5(4): 54. 1901.

Chlorobotrys regularis (W. West) Bohlin, Borzi. Bih.

 

Kongl. By. Vet.-Akad. Handl. 27, Afd. 5(4): 54. 1901.‘

 

74

(Pl. XV, Fig. 2)
See Rabenhorst (1959, Vol. 11, pp. 655-654) and Prescott
(1962, p. 555).
Cells 12.2-17.1u diam.

Mission Well (A-5; H-5, 18); Tykeson Pond (x-21).
Family Botryochloridaceae

Chlorellidiopsis Pascher, Heterokonten. In L. Raben-

 

horst, Kryptogamen-Flora von Deutschland, Oesterreich und

der Schweiz. 11: 685. 1959.

Chlorellidiopsis separabilis Pascher, Heterokonten.
In L. Rabenhorst, Kryptogamen-Flora von Deutschland, Oester-
reich und der Schweiz. 11: 686. 1959.

(P1. XV, Fig. 5)

See Rabenhorst (1959, Vol. 11, p. 686).

Cells 5.2-5.8u diam.

Mucilage yellow in color.

Epiphytic on Oedogpnium sp.

Mission Well (A-5).

Family Characiopsidaceae

Characiopsis Borzi, Studi algologici. 2: 151. 1894.

 

Characiopsis acuta Borzi, Studi algologici. 2: 155.

1894.

(P1. XV, Fig. 4)

75

See Prescott (1962, p. 558).
Cell 6.0u diam., 25.0u long (incl. stipe).
Chromatophores one to two large parietal plates.

Attached to Oedogonium Sp.

 

Tykeson Pond (x-2).

Characiopsis heeringiana Pascher, Heterokontae, Phae-

 

ophyta. In A. Pascher, Die Sfisswasserflora Deutschlands,
Oesterreichs und der Schweiz, 11: 65. 1925.
(P1. XV, Fig. 5)

See Pascher (1925, Part 11, p. 65) and Rabenhorst (1959,
Vol. 11, p. 768).

Cell 5.5u diam., 16.0u long.

Differentiated by cell shape and size and morphology of
apex.

Tykeson Pond (x-2).

Characiopsis ? sublinearis Pascher, Heterokontae, Phae-

 

 

ophyta. In A. Pascher, Die Sfisswasserflora Deutschlands,

 

Oesterreichs und der Schweiz, 11: 67, Fig. 51a. 1925.

 

(Pl. XV, Fig. 7)
See Pascher (1925, Part 11, p. 67) and Rabenhorst (1959,
Vol. 11, p. 772).
Cell 5.5u diam., 17.4u long (incl. stipe).

This perhaps is a young stage of B, sublinearis. Accord-

 

ing to Pascher (1925, p. 67); cells 4.0-6.0u diam., 20.0-

55.0u long; stipe one-Sixth cell length. The stipe in the

76

plant found is one-third cell length. According to Raben-
horst (1959, p. 772), the stipe is less than one-third cell
length.

Attached to Oedogonium Sp. Rabenhorst reports this

species epiphytic on Rhizoclonium filaments.

 

Mission Well (H-6).

Characigpsis tuba Lemmermann, Abhandl. Naturh. Ver.

 

 

Bremen. 25: 255. 1914.
(P1. XV, Fig. 6)

Rabenhorst (1951, Vol. 11, p. 744).

Cell 10.7u diam., 40.0u long (incl. stipe); stipe 11.4u
long.

This taxon is very closely related to a similar species,
B, pyriformis Borzi, the latter having smaller cells and being
more radially symmetrical.

Attached to Microchaete Sp.

 

Tykeson Pond (x-2).

Family Chlorotheciaceae

Ophiocytium Naegeli, Gattungen einzelligen Algen,

 

physiologische und systematische bearbeitet, 87. 1849.

 

Ophiocytium bicuspidatum (Borge) Lemmermann, Hedwigia

 

58: 51. 1899a.

(Pl. XV, Fig. 8)

77

See Pascher (1925, Part 11, p. 76) and Prescott (1962,
p. 565).

Cells 10.7u diam., 40.0—42.2u long; Spines 10.5-11.0u
long.

Tykeson Pond (x-2).

Qphiocytium capitatum Wolle, Freshwater algae pB_the

 

_B. S., 176. 1887.
(Pl. XV, Fig. 9)
See Prescott (1962, p. 565).
Cells 7.2-8.7u diam., 41.7-69.6u long.
Differentiated by its short Spines, one at each pole,
and by the cell diameter.

Tykeson Pond (x-15, 20).

Qphiocytium cochleare A. Braun, Algarum unicellularum

 

 

genera nova vel minus cognita, 54. 1855.

 

(Pl. XV, Fig. 11)
See Prescott (1962, p. 565).
Cells 4.6-7.0u diam.
Identified on the basis of a curved cell with one pole
rounded and one pole with a Spine.
Mission Well (H-15, 18); Tykeson Pond (x-5, 21).

Previously reported from Mission Well by Sieminska (1965).

Qphiocytium lagerheimii Lemmermann, Hedwigia 58: 50.

 

1899a.

(Pl. XV, Fig. 10)

78

See Rabenhorst (1959, Vol. 11, p. 890).

Cells 4.6u diam., 14.8-19.2u long.

Cells with one pole rounded, the other bearing a very
long Spine.

Mission Well (H-15). Previously reported from Mission

Well by Sieminska (1965).

Ophiocytium majus Naegeli, Gattungpn einzelligen Algen,

ppysiologische und systematische bearbeitet, 89. 1849.
(P1. XV, Fig. 15)

See Rabenhorst (1959, Vol. 11, p. 895) and Prescott
(1962, p. 565).

Cell 15.7u diam., 156.5u long (without Spine); Spine
17.8u long.

Cells curved; spines with nodular thickenings.

Tykeson Pond (x—7).

Ophiocytium parvulum A. Braun, Algarum unicellularum
gpnera nova vel minus cognita, 55. 1855.
(P1. XV, Fig. 12)
(Pl. XVI, Fig. 4)
See Prescott (1962, p. 565).
Cells 4.0-7.8u diam.’
Cells curved and without Spines.
Mission Well (Prescott 5 Mon 12, Mich. State Univ.);
Tykeson Pond (x-2, 7). Previously reported from Mission Well

by Sieminska (1965).

79
"Uncertain Positibn“

Leuvenia Gardner Univ. Calif. Berkelengubl. Bot. 4(4):

97. 1910.

Leuvenia natans Gardner, Univ. Calif. Berkelengubl.

 

.Bpp. 4(4): 97. 1910.
(Pl. XVI, Figs. 5, 6)
See Rabenhorst (1959, Vol. 11, p. 908).
Cells 20.0-27.8u diam., 41.8u long (max. length).
Cells sessile; scattered irregularly upon parenchyma
cells of higher plant tissue; Chromatophores parietal.

Mission Well (G vials).
Order Heterotrichales
Family Tribonemataceae

Tribonema Derbes & Solier, Mémoire sur quelques points

 

_§§ lg physiologie'des algues: 1. 1856.

Tribonema bombycinum (C. A. Agardh) Derbes & Solier,
Memoire sur guelqpes points g§_lg_physiologie des algues, 18.
1856.

(Pl. XVI, Fig. 1)

See Prescott (1962, p. 567).

Cells 7.0-8.7u diam., 14.0-27.9u long.

Cell wall thin, not Showing overlapping of the two wall
sections; Chromatophores four to eight.

Mission Well (H-15); Tykeson Pond (x-15).

80

Tribonema minus Hazen, Mem. Torrey Bot. Club 11: 185.

 

 

 

1902.
(Pl. XVI, Fig. 2)
See Prescott (1962, p. 568).
Cells 4.6-5.2u diam., 10.4-24.5u long.
Cells Slightly inflated, two to four (rarely six) times
the diameter in length; Chromatophores two to four irregular
discs.

Mission Well (H-4); Tykeson Pond (x-2).

Tribonema utriculosum (Kuetzing) Hazen, Mem. Torrey

 

 

Bp£,_Blpb 11: 186. 1902.
(P1. XVI, Fig. 5)
See Prescott (1962, p. 568).
Cells 11.0u diam., 17.4-54.8u long.
Cells stout with relatively heavy walls, clearly Showing
the overlapping of the two wall pieces in cell midregion;
Chromatophores many irregular discs.

Mission Well (H-11).

Class Chrysophyceae

Order Chrysomonadales

Suborder Chromulinineae

Family Mallomonadaceae

Mallomonas Perty, Zur Kenntnis kleinster Lebensformen

nach Bau, Funktionen, Systematik, mit Specialverzeichnis

 

 

 

81
der £2 der Schweiz beobachteten, 170. 1852.

’Mallomonas acaroides Perty, Zur Kenntnis kleinster
Lebensformen nach Bau, Funktionen, Bystematik, mipfiSpecial-
verzeichnisgderyin der Schweiz beobachteten, 171. 1852.

(Pl. XVI, Fig. 9)

See Prescott (1962, p. 571).
Cells (7.0)-15.0-(25.0)n diam., 18.0-25.4-(45.0)u long.

Tykeson Pond (C vials).
Suborder Isochrysidineae
Family Synuraceae

Synura Ehrenberg, Die Infusionsthierchen als vollkommene

Organismen, 60. 1858.

Bynura uvella Ehrenberg, Die Infusionsthierchen als
vollkommene Organismen, 61. 1858.
(P1. XVI, Fig. 7)
See Prescott (1962, p. 576).

Cells 5.6u diam., 7.1u long.
Cells were smaller than in the typical.

Mission Well (Prescott 5 Mon 12, Michigan State Univ.);

Tykeson Pond (x-19).

82

Suborder Ochromonadineae

Family Ochromonadaceae

‘Dinobryon Ehrenberg, Abhandl. Konigl. Akad. Wiss. Berlin

 

 

 

 

1855: 279. 1855.

Dinobryon sertularia Ehrenberg, Abhandl. Konigl, Akad.

 

 

Wiss. Berlin 1855: 280. 1855.
(P1. XVI, Fig. 10)
See Pascher (1915, Part 2, p. 72) and Prescott (1962,
p. 578).
Loricas 8.7—10.4u diam., 24.4-29.7u long.

Mission Well (A-2; H-9, 16, 22).

Colorless Flagellates
(In some classification systems, these may be considered a

part of the Chrysophyta.)
Order Protomastiginae
Family Amphimonadaceae

Rhipidodendron Stein, Die Infusionsthiere. 1880-1882.

 

 

Rhipidodendron huxleyi S. Kent, Manual pB_the Infusoria.

 

 

1880-1882.
(Pl. XVI, Fig. 8)
See Pascher &:Lemmermann (1914, Part 1, p. 115).

Cells oval, up to 6.0u long.

85

Flagella two to three times body length.

Tykeson Pond (C vials).

Division Euglenophyta

Class Euglenophyceae

Order Euglenales

Family Euglenaceae

“Euglena Ehrenberg, Die Infusionsthierchen als vollkommene

Organismen, 104. 1858.

 

Euglena ? gracilis Klebs, Untersuch. Bot. Inst. Tfibingen

1: 505. 1885.
(P1. XVII, Fig. 2)

See Prescott (1962, p. 595).

Cell 10.7u diam., 42.8u long.

Paramylon bodies not known for this Species; identifi-
cation somewhat questionable Since this taxon is metabolic
and was observed in the preserved condition.

Tykeson Pond (x-2, 5).

Euglena_sp.
(Pl. XVII, Fig. 1)

Cell 21.4u diam., 78.5u long.
Since this was observed in the preserved condition, there

would be no way of knowing if this species were metabolic.

84

Tykeson Pond (x-4). It should be pointed out that other
Species of this genus occur in both Mission Well and Tykeson

Pond.

Lepocinclis Perty, Natur. Ges. Bern Mitt., 28. 1849.

 

Lgpocinclis Sp.

 

(Pl. XVIII, Fig. 1)

See Huber-Pestalozzi (1955, Vol. 16, Part 4, p. 142)
and Conrad (1955, p. 19).

Cell 51.5u diam., 55.9u long.

Cell round in cross section; chloroplasts present;
paramylon body (bodies?) indistinct. In Huber-Pestalozzi
(1955, Vol. 16, Part 4, p. 142), this plant appears closest
to B. colligera Deflandre. This latter species differs from
the one found in the author's collection by having a definite
collar with dimensions of 5.5-4.0u diam. and 2.0u high. In
both species, striae Spiral to the left and almost perpendicu-
lar to the longitudinal axis; membrane heavily striated;

cells 48.0-50.0u long, 28.0-51.0u diam. In B. colligera,

 

there are small bodies of paramylon. The Species in question
cannot be justifiably identified because of the obscurity
of paramylon bodies and absence (?) of collar.

Tykeson Pond (B-15).

Phacus Dujardin, Histoire naturelle des ZOOphytes. In

 

Suites §_Buffon, 554. 1841.

85

Phacus ? hamatus Pochman, Arch. Protistenk. 95(2):

 

 

182. 1942.
(P1. XVIII, Fig. 2)

See Pochman (1942, p.'182) and Huber-Pestalozzi (1955,
Vol. 16, Part 4, p. 211).

Cell 51.5u diam., 58.5u long (caudus not included);
caudus 7.0u long.

The plant observed agrees well with this Species except
that longitudinal striae could not be seen. Paramylon bodies
appear as two rings, whereas, in most instances, one is ring
form and one is concentric.

Tykeson Pond (x-11).

Phacus lismorensis Playfair, Proc. Linn. Soc. B, B,

 

 

 

nggg 46: 125. 1921.
(Pl. XVIII, Fig. 4)
See Pochman (1942, pn 197)and.Huber-Pestalozzi (1955,
Vol. 16, Part 4, p. 219).
Cell 58.5u diam., 69.6u long; caudus 41.7u long.

Mission Well (H-5).

Phacus ? gpyx Pochman, Arch. Protistenk. 95(2): 192.
1942.
(Pl. XVIII, Fig. 6)
See Pochman (1942, p. 192).
Cells 55.0-54.8u diam., 58.5-40.0u long; caudus 6.2-

8.7u long.

86

The plants observed agree well with this species except
that longitudinal striae could not be seen. Size of para-
mylon bodies variable.

Mission Well (H-2, 4).

Phacus orbicularis Huebner, Progr. Realgymnasiums

 

 

 

Stralsund, 5. 1886.

 

(Pl. XVIII, Fig. 5)
See Pochman (1942, p. 178), Huber-Pestalozzi (1955,
Vol. 16, Part 4, p. 209), and Prescott (1962, p. 401).
Cell 58.5u diam., 41.7u long, 48.9u long (with caudus);
caudus 7.2u long.
Periplast finely striated; paramylon bodies two, one
large and one small; cell orbicular in outline.

Tykeson Pond (x-15).

Phacus pseudoswirenkoi Prescott, Farlowia 1: 568.

 

1944.
(P1. XVIII, Fig. 8)
See Prescott (1962, p. 402).
Cell 52.0u diam., 40.0u long; caudus 7.0u long.
Paramylon body, a large circular plate; lateral notches
rarely on both Sides.

Mission Well (H—16).

Phacus sp.

(Pl. XVIII, Fig. 5)

87

Cell 19.7u diam., 27.8u long (incl. caudus).

The plant observed agrees well with B, minutus Pochman,
a Species having few paramylon bodies and a caudus turned
180 degrees from that of the observed Specimen.

Tykeson Pond (B-9).

Trachelomonas Ehrenberg, Abhandl. KOngl. Akad. Wiss.

 

 

 

Berlin 1855, 515. 1855.

Trachelomonas robusta Swirenko, Arch. Hydrobiol. Plank-

 

 

tonk. 9: 656. 1914.
Previously reported from Mission Well by Sieminska

(1965); not found in the author's 1965-1966 collections.

Trachelomonas rotunda Swirenko, Arch. Bydrobiol. Plank—

 

 

 

Bgn_k_. 9: 656. 1914.
(P1. XVIII, Fig. 10)
See Huber-Pestalozzi (1955, Vol. 16, Part 4, p. 267)
and Prescott (1962, p. 415).
Test 21.2u diam., 26.7u long.

Mission Well (A—4).

Trachelomonas superba var. swirenkiana Deflandre, Mono-

 

 

graphie gp_genre Trachelomonas, 184. 1926.
(P1. XVIII, Fig. 7)
See Prescott (1962, p. 418).

Test 51.5u diam., 40.0u long.

88

Posterior spines longer and stouter than in the anterior
region; flagellum aperture in a low, ring-like collar.

Tykeson Pond (C-2, 5).

Trachelomonas varians (Lemmermann) Deflandre, Bull. Soc.

 

 

Bot. France 71: 1128. 1924.

 

(Pl. XVIII, Fig. 9)
See Prescott (1962, p. 418).
Test 24.5u diam., 26.1u long.
Wall smooth; canal extends inwardly to test cavity;
wall golden- or reddish-brown; as listed, test 25.0u diam.;
25.0-26.0u long.

Mission Well (A-7; H-4, 7, 19).
Colorless Euglenoids
Family Astasiaceae

Menoidium Perty, Zur Kenntnis kleinster Lebensformen

 

 

nach Bau, Funktionen, Systematik, mit Specialvaezeichnis

 

 

der Bp_der Schweiz beobackteten Arten. 1852.

 

Menoidium Sp.

 

(Pl. XVIII, Fig. 11)
See Huber-Pestalozzi (1955, Vol. 16, Part 4, pp. 440-449).
Cell 7.8u diam., 40.0u long.
Longitudinal striae not visible when Specimens are

treated with methylene blue. There may also be a difference

89

in measurements of the diameter and thickness of the cell,
this not being recorded.

Mission Well (H-2).

Petalomonas Stein, Die Infusionsthiere. 1859.

 

 

Petalomonas octocostatus pp, ppy.
(Pl. XVII, Figs. 5—9)

Periplast 21.8-26.1-51.5-54.8-40.0-41.7-45.5u diam.,
58.5-40.0-45.2-52.2-55.9—54.2-64.4-67.8-68.5u long.

For those seen in top and/Or bottom View, the following
Specific periplast measurements were taken: 40.0u diam.,
57.5u thick; 45.5u diam., 54.8u thick; 41.7u diam., 57.5u
thick.

Cells roundly oval to elongately oval with a firm peri-
plast which allows the cells to retain a definite form. The
anterior portion of the cell appears more rounded than the
posterior end. Cell margins convex, in contrast to the more
or less subparallel margins in smaller forms. The periplast
is marked with eight comparatively straight, longitudinal
keels extending from the anterior to the posterior end, one
keel on the ventral surface does not quite extend the full
length of the periplast. It Should be emphasized that this
particular species is more nearly spherical in cross section
than any known Species of this genus, the arrangement of the
keels and the furrows between them being approximately equally
Spaced except where more narrow furrows appear adjacent to

the one shorter keel on the ventral surface.

90

The following references were consulted before determin-
ing this taxon to be a new species: Bourelly (1961,;3» 512-
515), Christen (1959,I4L 297-500; 1962,54» 169-178), Huber-
Pestalozzi (1955, Vol. 16, Part 4, p. 482), Peterfi (1965,
pp. 274-275), Shawhan and Jahn (1947, pp. 182-189), Skuja
(1956, p. 247; 1964, pp. 285-284), Skvortzow (1958, pp. 177-
179), and Thomasson (1960, pp. 15—14).

Mission Well (A—5, 9, 10; H-19).
Division Pyrrhophyta
Class Dinophyceae
Order Gymnodiniales
Family Gymnodiniaceae

Gymnodinium (Stein) Kofoid & Swezy, Mem. Univ. Calif.

 

5: 158. 1921.

Gymnodinium palustre Schilling, Blppg 74: 248, 277,

278. 1891.
(Pl. XIX, Fig. 1)

See Huber-Pestalozzi (1950, Vol. 16, Part 5, p. 125)
and Prescott (1962, pp. 425—426).

Cell 27.8u diam., 40.0n long.

Epivalve longer than hypovalve, epivalve convex-conical
Shaped and apex broadly rounded; hypovalve rounded trapezoid

form. Differentiated primarily upon basis of cell size;

91

this species closely resembles B. uberrimum (Allman) Kofoid

and Swezy, the latter being more broad, cells 58.0-42.0u

diam.

Tykeson Pond (x-1).

Gymnodinium skvortzowii Schiller, In Rabenhorst's Krypto-
gamen-Flora Dinoflagellatae 10(1): 415. 1955.
(P1. XIX, Figs. 2,. 3)
See Huber-Pestalozzi (1950, Vol. 16, Part 5, p. 119-120).
Cells 20.9-24.4u diam., 27.8-51.0u long.
Epicone and hypocone are of the same length; chromato-
phores yellow-brown. Some of the Specimens observed were

associated epiphytically ? with a colony of Dinobryon sertu—

laria.

Mission Well (H-5).

Gymnodinium undulatum Woloszynska, In Rabenhorst's
Kryptogamen-Flora Dinoflagellatae 10(1): 424. 1925.
(P1. XIX, Figs. 5, 6)
See Huber-Pestalozzi (1950, Vol. 16, Part 5, p. 120).
Cells 20.9-24.4u diam., 27.8-54.8u long.
The epivalve may be somewhat smaller than the hypovalve.
According to Huber-Pestalozzi (1950, p. 120), the undulations

are very likely only an expression of a pathological process.

Mission Well (H-5).

92

Family Peridiniaceae

Peridinium Ehrenberg, Abhandl. KOngl. Akad. Wiss. Berlin

 

 

 

1850, 58. 1852.

Peridinium volzii Lemmermann, Museums in Bremen, 145-

 

174. 1904.
(P1. XIX, Figs. 4,7)
See Huber-Pestalozzi (1950, Vol. 16, Part 5, p. 195)
and Eddy (1950, p. 299).
Cells 41.7-50.4u diam.
Mission Well (H-17); Tykeson Pond (x-9). Previously

reported from Mission Well by Sieminska (1965).

Peridinium Sp.

 

(Pl. XIX, Fig. 8)
Cell 51.5u diam., 58.5u long.
Cell flattened somewhat dorsiventrally; more views
needed for positive identification.
Tykeson Pond (x-5). It should also be noted that other

Species occur in both Mission Well and Tykeson Pond.
Order Dinocapsales
Family Gloeodiniaceae

Gloeodinium Klebs, Verhandl. Naturh. med. Vereins Heidel-

 

 

 

 

berg 11(4). 1912.

95

Gloeodinium montanum Klebs, Verhandl. Naturh. E39:
. Vereins Heidelberg 11(4): 567-451. 1912.
(P1. XIX, Fig. 9)
See Huber-Pestalozzi (1950, Vol. 16, Part 5, p. 285).
Cells 55.0-54.8u diam. (max. diam.).

Mission Well (G-5); Tykeson Pond.
Order Dinococcales
Family Dinococcaceae

Cystodinium Klebs, Verhandl. Naturh. med. Vereins Heidel-

 

berg 11(4): 584, 442, 1912.

Cystodinium iners Geitler, Arch. Protistenk. 61: 5. 1928.

 

(Pl. XIX, Fig. 10)
(Pl. XXVIII, Fig. 5)
See Prescott (1962, p. 459).
Cells 26.1-55.0u diam.,(45.2)-55.7-62.6u long.; spines
15.9-14.6u long.
Cells with inner margin Slightly tumid or straight,
outer margin broadly convex; large nucleus; numerous chromato-
phores.

Mission Well (H-4, 24); Tykeson Pond (x-21; Q-1).

94

Division Cyanophyta

Class Myxophyceae

Order Chroococcales

Family Chroococcaceae

Aphanocapsa Naegeli iJI Kuetzing, Bpecies algarum, 52.

 

1849.

Aphanocapsa elachista var. conferta West & West, B,

Linn. Soc. Bot. 40: 452. 1912.

 

(Pl. XX, Fig. 1)
See Prescott (1962, p. 455).
Cells 1.7-2.0u diam.; colony 185.6u diam.
This variety differs from the typical by having Spherical
cells crowded within a hyaline colonial mucilage, often with
many cells in pairs.

Mission Well (A—7); Tykeson Pond (x—2).

Aphanocapsa elachista West & West, B, Linn. Soc. Bot.

 

50(1895-1895): 276. 1895. var. elachista.

 

(Pl. XX, Fig. 2)
See Prescott (1962, p. 455).
Cells 1.5-1.7u diam.; colony 55.7u diam.
Cells small, globose, often in pairs and widely separated
in colorless mucilage.

Mission Well (H-22).

95

Aphanocapsa elachista var. planctonica G. M. Smith,

 

 

Wisc. Geol. Nat. Hist. Surv., Bull. 57: 42. 1920.

 

 

(Pl. XX, Fig. 5)
See Prescott (1962, p. 454).
Cells 2.0-2.4u diam.

Cells less crowded than in B, elachista var. conferta,

 

evenly dispersed throughout a colorless, colonial mucilage.

Tykeson Pond (x-2).

Aphanocapsa pulchra (Kuetzing) Rabenhorst, Florae Eur-

 

 

opaea algarum aquae dulcis §B_Submarine. 2: 49. 1865.

 

 

(Pl. XXI, Fig. 2)
See Prescott (1962, p. 454).
Cells 5.6-4.4u diam.
The specimen observed agrees well with this Species,
having cells Spherical, loosely and evenly dispersed through
colorless mucilage.

Adhering to Gonatozygon Sp.

 

Mission Well (H-22).

Aphanocapsa rivularis (Carmichael) Rabenhorst, Florae

 

Europaea, algarum aqpae dulcis SE submarinae 2: 49. 1865.

 

 

(Pl. XXI, Fig. 1)
See Prescott (1962, p. 454).
Cells 4.6-5.5-7.00 diam.
Cells in pairs, not evenly dispersed as in a Similar

Species, B, pulchra. Another closely related species,

96

.B. grevillei (Hassall) Rabenhorst has pseudovacuoles.

Mission Well (A-7; H-20).

Aphanothece Naegeli iJl Kuetzing, Species algarum, 59.

1849.

Aphanothece micrOSCOpica Naegeli, Gattungen einzelligen

Bng , physiologische und systematische bearbeitet: 59. 1849.
(P1. XXI, Fig. 5)

See Prescott (1962, p. 467).

Cells 5.5-4.0u diam., 5.2-5.5-(7.0)u long.

Cells too large for B, gelatinosa (Hennings) Lemmermann;
cells generally too small to be B. prasina A. Braun. Portion
of colony adhering to other algae.

Mission Well (A-1, 7).

Aphanothece nidulans P. Richter, Bot. Notiser: 128. 1884.
var. nidulans.
(Pl. XXI, Fig. 4)
See Prescott (1962, p. 468).
Cells 1.2-1.5-1.7u diam., 5.0-5.5u long.
Cells Short-cylindric, broadly rounded at the apices,
densely and evenly distributed.

Mission Well (H-22); Tykeson Pond (x-7).

Aphanothece saxicola Naegeli, Gattungen einzelligen
Algen, physiologische und pystematische bearbeitet, 60. 1849.

(P1. XXI, Fig. 5)

97

See Prescott (1962, p. 468).

Cells 1.0u diam., 5.5u long (max. length).

Cells cylindrical with rounded ends, two to three and
one-half times longer than wide, loosely arranged, solitary
or in pairs.

Tykeson Pond (x-14).

Chroococcus Naegeli, Gattungen einzelligen Algen, physiolo-

 

gische und systematische bearbeitet, 45. 1849.

Chroococcus limneticus Lemmermann, Bot. Centralbl. 76:
155. 1898. var. limneticus.

(Pl. XX, Fig. 5)

See Prescott (1962, p. 448).

Cells 7.0u diam.

Individual cell sheath usually indistinct; distinct
in this case. This agrees mostcloseLyvdth B, limneticus
which according to Prescott (1962, p. 448), can sometimes
occur in groups of two to four cells because of rapid cell
division.

Tykeson Pond (x-8).

Chroococcus minor (Kuetzing) Naegeli, Gattungen einzel-

 

ligen Algen, physiologische und gystematische bearbeitet,
47. 1849.
(P1. XX, Fig. 6)

See Prescott (1962, p. 449).

98

Cells 2.7-5.5-4.2u diam.

Cells (spherical or angular from mutual compression) are
irregularly scattered, singly, in pairs, or in larger groups;
individual cell sheaths scarcely ViSible; colony entangled
among other algae.

Mission Well (H-22); Tykeson Pond (x—8, 15).

Chroococcus minutus (Kuetzing) Naegeli, Gattungen

 

 

einzelligen Algen, physiologische und pystematische bearbeitet,

 

46. 1849.
(P1. XX, Fig. 4)
See Prescott (1962, p. 449).
Cells 5.2-5.8-(10.0)u diam.
Individual cell sheaths are not distinct; entangled
among other algae.
Mission Well (H—11, 22). Previously reported from

Mission Well by Sieminska (1965).

Chroococcus prescottii Drouet & Dailey in Drouet, Field

Mus. Bot. Ser. 20: 127. 1942.

 

 

(Pl. XX, Fig. 8)
See Prescott (1962, p. 450).
Cells 4.5-5.5u diam.; Colony (52-celled) 29.6u x 54.8u.
Cells not lamellated; cells not dense as in Eucapsis
alpina Clements and Shantz; cube or sarciniform clusters.

Mission Well (H-8); Tykeson Pond (x-5).

99

Chroococcus turgidus (Kuetzing) Naegeli, Gattungen

 

einzelligen Alggn, physiologische und systematische bearbeitet,
46. 1849.
(P1. XX, Fig. 7)

See Desikachary (1959, p. 101) and Prescott (1962, p.
450).

Cells 12.2-17.4u diam.

Lamellate Sheath; cells inclosed by individual sheaths.

Mission Well (H-22; G-1); Tykeson Pond (B-1). Previously

reported from Mission Well by Sieminska (1965).

CoelOSphaerium Naegeli, Gattungen einzelligen Algen,

 

physiologische und systematische bearbeitet, 54. 1849.

Coelosphaerium ? dubium Grunow in Rabenhorst, Flora

 

EurOp. Algar. 2: 55. 1865.
(P1. XXII, Fig. 1)

See Prescott (1962, p. 470).

Cells 5.2-7.0u diam.

The author has identified this taxon on cell diameter,
presence of pseudovacuoles in the cell contents, and the
colony being a hollow sphere with cells on the periphery.
This particular plant is somewhat questionable due to the
smallness of the colony.

Tykeson Pond (x-8).

100

CoelOsphaerium kuetzingianum Naegeli, Gattungen
einzelligen Algen, physiologische und systematische bear-
beitet, 54. 1849.

(P1. XXII, Fig. 2)

See Prescott (1962, p. 470).

Cells 5.0—5.5u diam.

According to Prescott (1962), cells round 2.5-4.0u diam.

Tykeson Pond (x-8).

Coelosphaerium naegelianum Unger, Denskr. Akad. Wiss.

Eggp‘7: 196. 1854.
(P1. XXII, Fig. 5)

See Prescott (1962, p. 470).

Cells 1.5-5.5u diam., 5.5-4.0u long; colony 27.8u
diam., 48.7u long.

Cell contents having pseudovacuoles; colonial mucilage
with fibrillar concretions.

Tykeson Pond (x-1, 15).

Coelosphaerium pallidum Lemmermann, Bot. Centralbl.
76: 154. 1898.
(P1. XXII, Fig. 4)
See Prescott (1962, p. 471).
Cells 1.2-1.7u diam., 5.0-5.5u long; colony 20.9u diam.
Cell contents lacking pseudovacuoles; colonial mucilage
without radiating fibrillar concretions.

Mission Well (A-1).

101

Dactylococcopsis (Reinsch) Hansgirg, Notarisia 5: 590.

1888a.

Dactylococcopsis fascicularis Lemmermann, Bot. Centralbl.

 

 

76: 155. 1898.
(P1. XXII, Fig. 5)
See Prescott (1962, p. 464).
Cells 1.5-1.7u diam., 22.6u long.

Mission Well (H-12).

Dactylococcopsis rhaphidioides Hansgirg, Notarisia 5:

 

590. 1888a.
(Pl. XXII, Fig. 6)
See Prescott (1962, p. 464).
Cells 1.7u diam., 19.0-20.2u long.

Tykeson Pond (x-8).

Eucapsi§_Clements & Shantz, Minn. Bot. Studies 4: 154.

1909.

Eucapsis alpina var. minor Skuja, Acta Horti Bot. Univ.

 

Latviensis 1: 155. 1926.
(P1. XXII, Fig. 7)
See Geitler in Rabenhorst (1952, Vol. 14, p. 258).
Cells 2.5-5.0u diam.; colony 20.9u x 26.1u.
Mission Well (H-11; Y-1). Previously reported from

Mission Well by Sieminska (1965).

102

Glaucocystis Itzigsohn in Rabenhorst, No. 1955. 1866.

emend. Geitler, Arch. Protist. 1925.

 

Glaucocystis oocystiformis Prescott, Farlowia 1: 572.

 

1944.
(P1. XXII, Fig. 10)
See Prescott (1962, p. 475).
Cells 20.0-27.5u diam., 40.0-45.0u long.
Cells solitary.

Mission Well (G vials).

HolOpedia Lagerheim, Nuova Notarisia 4: 208. 1892.

 

Holopedia irregularis Lagerheim, Nuova Notarisia 4: 208.

 

 

1892.
(P1. XXII, Fig. 9)
See Geitler in Rabenhorst (1952, Vol. 14, p. 267).
Cells 5.4-5.7u diam., 5.2-7.0u long.

Mission Well (H—24).

Merismopedia Meyen, Arch. Nuturg., 67. 1859.

 

 

Merismoppdia elegans A. Braun in Kuetzing, Species
algarum, 472. 1849.
(P1. XXII, Fig. 8)
See Geitler in Rabenhorst (1952, Vol. 14, p. 265) and
Prescott (1962, p. 459).
Cells 5.2-5.8u diam., 7.0-7.5u long; colony 51.5u x

52.2u.

105

This Species usually has larger cells than found in a
very closely related species, B. glauca (Ehrenberg) Naegeli.

Mission Well (H vials); Tykeson Pond (x-11).

Merismopedia glauca (Ehrenberg) Naegeli, Gattungen;

 

einzelligen Algen, physiologische und pystematische bear-
beitet, 55. 1849.
(P1. XXIII, Figs. 1-5)

See Geitler in Rabenhorst (1952, Vol. 14, p. 264) and
Prescott (1962, p. 459).

Cells 5.2-5.2u diam., 5.5-5.8u long; colony 54.8u
x 45.2u.

This species usually has smaller cells than found in a
very closely related species, B, elegans.

Mission Well (A-1; H-11, 15, 20, 22); Tykeson Pond

(x-6, 8).

Merismopedia minima Beck, Ann. B, B, Naturh. Hofmus.

 

12. 85. 1897.
(P1. XXII, Fig. 12)
See Geitler in Rabenhorst (1952, Vol. 14, p. 265) and
Desikachary (1959, p. 154).
Cells 0.7-0.9u diam.; colony 4.9u diam.
According to Geitler (1952), this Species may be con-

sidered doubtful.

Mission Well (H—22).

   

104

Merismopedia punctata Meyen, BBEB. Naturg., 67. 1859.
(P1. XXII, Fig. 11)
See Geitler in Rabenhorst (1952, Vol. 14, p. 265) and
Prescott (1962, p. 459).
Cells 2.4-5.0u diam., 5.5-4.8u long; colony 54.8u
diam. (52-celled).

Mission Well (H-22); Tykeson Pond (x-5).

Merismgpedia tenuissima Lemmermann, Bot. Centralbl.
76: 154. 1898.
(P1. XXII, Fig. 15)
See Geitler in Rabenhorst (1952, Vol. 14, p. 265) and
Prescott (1962, p. 459). I. T
Cells 1.2-1.6u diam.; colony 7.5u diam.
Cells mostly crowded, brightly blue—green.

Tykeson Pond (x—7).

Microcystis Kuetzing, Linnaea 8: 572. 1855a.

 

Microcystis aeruginosa Kuetzing EEEEQ- Elenkin, B9, §X§E~
Inst. Crypp, Horti. Bot. Petropol. 5(1): 14. 1924.
(P1. XXIII, Fig. 4)
See Prescott (1962, p. 456).
Cells 2.5-5.2u diam.
Differentiated on the basis of a clathrate colony.

Mission Well (H-11); Tykeson Pond (x—8).

105

Microcystis incerta Lemmermann, Das Phytoplankton sach-

 

 

sischer Teiche. Forschungsberichte, PlOn. 7: 152. 1899.
1 (Pl. XXIII, Fig. 5)
See Prescott (1962, p. 457).
Cells 1.6-5.0u diam.
The small size and compact arrangement of the cells aid
in the identification of this species.
Mission Well (H vials); Tykeson Pond (x-2). Previously

reported from Mission Well by Sieminska (1965).

Rhabdoderma Schmidle & Lauterborn, Ber. Deut. Bot. Ges.

 

18: 148. 1900.

Rhabdoderma gorskii Woloszynska, Bull. Acad. Cracovie,

 

 

127. 1917.
(P1. XXIII, Fig. 7)
See Prescott (1962, p. 465).
Cells 1.5-1.7u diam., 8.7-10.8u long.
Cells seven to ten times their diameter in length,
arcuate or somewhat sigmoid; longitudinal axes approximately
parallel with that of the colony.

Mission Well (H-12).

Rhabdoderma lineare Schmidle & Lauterborn in Schmidle,

Ber. Deut. Bot. Ges. 18: 148-149. 1900.

 

(Pl. XXIII, Fig. 6)
See Prescott (1962, p. 465).

Cells 1.8-2.5u diam., 4.5—8.4u long.

106

Cells straight; longitudinal axis of cells mostly
parallel; individual cell sheaths entirely Confluent with

the colonial mucilage.

Mission Well (H-12).

Synechococcus Naegeli in Kuetzing, Species algarum,

56. 1849.

Synechococcus euryphyes G. Beck, Vestn. Kralov. Ceske
Spolecnosti Nauk 2: 17, Fig. 40. 1926.
(P1. XXIV, Figs. 1-5)
See Geitler in Rabenhorst (1952, Vol. 14, p. 275).
Cells 29.6-54.8u diam., 58.2u long (max. length).
Geitler (1952) states that as far as the diagnosis and
the figure are concerned it is evident that this species

should be dealt with best as Synechocystis rather than Syne-

chococcus.

Mission Well (G-1; Y-1).
Order Hormogonales
Suborder Homocystineae
Family Oscillatoriaceae
Lyngbya C. A. Agardh, Systema algarum 1: xxv. 1824.

Lyngbya aestuarii Liebmann, Bemérkninger pg_Tillag
til den danske Algeflora. KrOyers Tidsk., 492. 1841.

(P1. XXIV, Fig. 4)

107

See Prescott (1962, p. 499).

Cells 8.2u diam., 5.6-6.2u long; filaments 10.7u diam.

This species is separated from a closely related taxon,
.B. ggjp£_Meneghini, in that the former does not have a
thickened outer membrane on the apical cell.

Tykeson Pond (x-2).

Lyngbya mgrtensiana Meneghini, Conspectus algologiae

 

euganeae, 25. 1857.

 

(P1. XXIV, Fig. 5)
See Prescott (1962, p. 502).
Cells 5.2-7.2u diam., 5.0-5.5u long; filaments 8.7-10.0u
diam.
This species differs from a closely related Species,
.B. putealis Montagne, in that the former does not have
trichomes constricted at the cross walls.

Mission Well (H-1, 15).

 

Vegetale 15: 200. 1840. pthomont, Monogr. Oscillarieés,
145, P1. 5, Fig. 14. 1892.
(P1. XXIV, Fig. 6)
See Desikachary (1959, p. 518).
Cells 4.0u diam., 7.5u long; filaments 9.8-10.0u diam.
Cells constricted at the cross walls.

Mission Well (H-11).

108

. . . . I
OSClllatoria Vaucher, HistOIre des conferves d'eau

 

 

douce, 165. 1805.

Oscillatoria agardhii Gomont, Ann. Sci. Nat. Bot. Biol.

 

Vegetale 16(7): 205. 1892.
(P1. XXIV, Fig. 7)

See Prescott (1962, p. 484).

Cells 5.2u diam., 2.8-5.1u long.

Identified on basis of: trichome straight with capitate
anterior end; apical cell truncate-conical; cells not con-
stricted at the cross walls, which are granular; length one-
half to equal the width.

Mission Well (H-22).

Oscillatoria amphibia C. A. Agardh, BBQBB 10: 652. 1827.
(P1. XXIV, Fig. 8)

See Prescott (1962, p. 485) and Desikachary (1959,
p. 204).

Cells 2.9-5.0u diam., 5.5-5.2u long.

Apical cell broadly rounded; cells not constricted at
the cross walls, with a single large granule on each side,
a series of paired granules showing throughout trichome
length.

Tykeson Pond (Q-1).

Oscillatoriaangustissima West & west, B, Bot. 55: 500.
1897a.

(Pl. XXIV, Fig. 9)

109

See Prescott (1962, p. 485).
Cells 0.9u diam., 2.4u long.
This is one of the smallest Species within the genus.

Tykeson Pond (x-5).

Oscillatoria rubescens De Candolle, Mem. Soc. Phys.
.EEE- Geneve 2: 29. 1825.
(Pl. XXIV, Fig. 10)
See Prescott (1962, p. 490).
Cells 7.0u diam., 5.5u long.
Distinguished by pseudovacuoles; no constrictions at the
cross walls; apical cell capitate; little or no tapering.

Tykeson Pond (x-8).

Oscillatoria subbrevis Schmidle, Engler's Bot. BBBBB,

50: 245. 1901.
(P1. XXIV, Fig. 11)

See Prescott (1962, p. 491).

Cells 5.5u diam., 1.7-5.0u long.

Cells not granular at the cross walls; trichome not
tapering in apical region; apical cell not capitate; frequent
necridia.

Mission Well (H-22).

Oscillatoria tenuis var. natans Gomont, Ann. Sci. Nat.
Bot. Biol. Vegetale 16(7): 221. 1892.

(P1. XXIV, Fig. 12)

110

See Prescott (1962, p. 491).

Cells 7.2u diam., 5.8-5.2u long.

This variety differs from the typical by having more
stout trichomes; cells longer; apical cell truncately rounded.

Tykeson Pond (x-15).

Oscillatoria tenuis C. A. Agardh, Algarum Decades, 25.

 

 

1815. var. tenuis.
(Pl. XXIV, Fig. 15)
See Prescott (1962, p. 491).
Cells 4.0-7.0-7.8u diam., 2.5-5.0-5.5u long.
Cells constricted and granular at the cross walls;
apical cell convex, smooth, and not capitate; trichome straight
or slightly flexuous.

Mission Well (H—11); Tykeson Pond (x-5, 9).

Phormidium Kuetzing, Phycologia generalis, oder Anatomie,

 

 

Physiologie und Systemkunde der Tange: 190. 1845.

Phormidium ambiguum Gomont, Ann. Sci. Nat. Bot. Biol.

 

 

Vegetale 16(7): 178. 1892.
(P1. XXV, Fig. 1)
See Geitler in Rabenhorst (1952, Vol. 14, p. 1015).
Cells 4.0u diam., 1.2-2.5u long; filament 5.2u diam.
This Species has very light constrictions; and cells
rounded without a calyptra; cross walls often granulated;
sheath many times thick; forming plant masses.

Mission Well (A-9).

111

Phormidium ? subcapitatum Boye-Petersen, Freshw. Cyan.

 

Iceland, 282, Fig. 5. 1925.
(Pl. XXV, Fig. 2)

See Geitler in Rabenhorst (1952, Vol. 14, p. 1009) and
Prescott (1962, p. 495).

Cells 2.5u diam., 2.5u long.

The plant in question best fits for this Species. It is
questionable since the trichomes were not “lightly" constricted
at the cross walls, and it has been previously found on soil.
Also, there is no mention in Geitler (1952) of granules at
the cross walls as were observed in these plants.

Mission Well (H-25).

Phormidium tenue (Meneghini) Gomont, Ann. Sci. Nat. Bot.

 

 

 

Biol. Vegetale 16(7): 169. 1892.
(P1. XXV, Fig. 5)
See Prescott (1962, p. 496).
Cells 1.0-1.2u diam., 2.5-5.1u long.
Cells constricted at the cross walls; not granulate;
cell contents homogeneous; filaments blue-green.

Mission Well (A-7).

Suborder Heterocystineae

Family Nostocaceae

Anabaena Bory, In Dictionnaire d‘histoire naturelle:

507. 1822.

112

Anabaena gylindrica Lemmermann, Ber. Biol. Stat. PlOn

 

 

4: 186, Fig. 1. 1896.
(P1. XXV, Figs. 4, 5)

See Geitler in Rabenhorst (1952, Vol. 14, pp. 885-884).

Vegetative cells 5.2-5.5u diam., 5.2-7.0u long; hetero-
cysts 4.8-5.2u diam., 4.8-7.2u long; gonidia 5.2-6.0u diam.,
17.4-26.1u long.

Gonidia were observed on both sides of the heterocyst
in some plants. According to Geitler (1952), trichomes mostly
straight without a gelatinous Sheath; cells quadrate to
cylindrical with rounded ends, 5.0-4.0u diam., 5.0-5.0u long;
heterocysts almost Spherical, 5.0u diam., 6.0-8.0u long;
gonidia on both sides of heterocyst, 5.0u diam., 16.0-50.0u
long; free-floating or attached to aquatic plants.

Mission Well (H-5); Tykeson Pond (x-7).

Anabaena inaequalis (Kuetzing) Bornet & Flahault, Ann.

Sci. Nat. Bot. Biol. Vegetale 7(7): 251. 1888.

 

(Pl. XXV, Fig. 6)
See Geitler in Rabenhorst (1952, Vol. 14, pp. 896-897).
Vegetative cells 4.0u diam., 4.0-6.0u long; heterocysts
6.5u diam., 7.0u long; gonidia 5.2u diam., 11.2u long.
Cells mostly one and one-half times longer than wide.
According to Geitler (1952), the mucilaginous sheath may be
absent; cells short-barrel-Shaped, 4.0-6.0u diam.; end cells

rounded; heterocysts spherical to elongate, 6.0u diam. and

115

up to 10.0u long; gonidia cylindrical, 6.0-8.0u diam.,
14.0-20.0u long.

Tykeson Pond (x-8).

Anabaena lapponica Borge, Bot. Notiser, 101. 1915.

 

(Pl. XXV, Fig. 7)
See Prescott (1962, p. 516).
Vegetative cells 8.7-10.4u diam.; heterocysts 12.1u
diam.; gonidia 15.9-15.6u diam., 27.8-59.1u long.
Both vegetative cells and heterocysts globose; gonidia
cylindrical, developing on both Sides of the heterocyst.

Tykeson Pond (Q-1).

,Anabaena torulosa (Carmichael) Lagerheim, Oefv. Kongl.

‘By. Vet.-Akad. FOrhandl. 40(2): 47. 1885.

 

(Pl. XXV, Fig. 8)
See Prescott (1962, p. 518).
Vegetative cells 4.6u diam., 5.2u long; heterocysts
6.9u diam., 5.2u long; gonidia 8.7u diam., 27.8u long.

Mission Well (H-6).

Anabaena ? variabilis Kuetzing, Phyp, gen., 210. 1845.

 

 

(Pl. XXV, Figs. 9, 10)
See Geitler in Rabenhorst (1952, Vol. 14, pp. 876-877)
and Prescott (1962, p. 519).
Vegetative cells 5.0-5.5u diam., 2-3-5-2H long; hetero-
cysts 4.6-5.2u diam., 5.2-7.0u long; gonidia 5.7-5.2u diam.,

5.2-7.5u long.

114

The Montana plants agree closely with this Species.
There is some question because in two instances gonidia ap-
peared adjacent to heterocysts, but this certainly was the
exception. According to Geitler (1952): trichomes forming
a definite layer in mucilage; individual trichomes without
sheaths; cells with gas vacuoles; cells 4.0-6.0u diam.,
2.5-6.0u long, constricted at the cross walls; heterocysts
6.0u diam., up to 8.0u long; gonidia 7.0-9.0u long. Tri-
chomes were greatly entangled in plant debris; gonidia in
series of six to nine.

Mission Well (H-11).

Nodularia Mertens in Jfirgens, Algae aquaticae, Dec. 15

 

(4). 1922.

Nodularia ppumigena Mertens in Jfirgens, Algae aquaticae,

 

Dec. 14 (4). 1822.
(P1. XXV, Fig. 11)
See Prescott (1962, p. 527).
Vegetative cells 8.7-10.4u diam., 4.6-6.0u long;
heterocysts 12.1u diam., 7.0u long; gonidia not found; fila-
ments 15.9u diam.

Tykeson Pond (C-1).

0 . /
Nostoc Vaucher, Histo1re des conferves d'eau douce,

205. 1805.

115

Nostoc caeruleum Lyngbye, Tentamen Hydrophytologiae

 

 

Danicae, 201. 1819.
(P1. XXV, Fig. 12)
See Prescott (1962, p. 522).
Vegetative cells 6.5u diam.; heterocysts 6.8-7.5u diam.;
gonidia absent; colonies 0.5-7.5 mm. diam.
Tykeson Pond (B-5, C-5). Appearing very abundantly in

the east end in mid summer.
Family Scytonemataceae

Microchaete Thuret, Ann. Sci. Nat. Bot. Biol. Vegetale

 

 

1(6): 578. 1875.

Microchaete calothrichoides Hansgirg, Beih. Bot.

 

 

Centralbl., 494. 1905.

 

(Pl. XXVII, Fig. 1)

See Geitler in Rabenhorst (1952, Vol. 14, pp. 671-672).

Vegetative cells (5.8)-6.7u diam., (5.0)-6.6u long;
basal heterocyst 7.0-8.7u diam., 7.6-8.1u long; intercalary
heterocysts 4.0-5.2u diam., 9.8-20.8u long; filaments (6.7)-
10.4u diam.

According to Geitler (1952): sheath lamellated; fila-
ments 10.0-16.0u diam.; cells at filament base, 6.0-8.0u
diam.; cells constricted at the cross walls; heterocysts
mostly basal, ovoid to long-elliptical, 6.0u diam., up to
8.0u long.

Tykeson Pond (x-16; B-14).

116

Microchaete tenera Thuret, Ann. Sci. Nat. Bot. Biol.

 

 

 

Vegetale 1(6): 578. 1875.
(P1. XXVII, Fig. 2)

See Geitler in Rabenhorst (1952, Vol. 14, p. 668) and
Prescott (1962, p. 542).

Vegetative cells 5.5u diam., 4.0-5.5u long; intercalary
heterocyst 6.5u diam., 14.5u long; filament 7.0u diam.

Distinguished on basis of cell, heterocyst, and filament
Size; sheath simple, not lamellated.

Tykeson Pond (x-2).
Sgytonema C. A. Agardh, Systema algarum 1: xxii. 1824.

Scytonema bohnerii Schmidle, Bag, BBB, BBBBB, 50: 60.
1902.
(P1. XXVI, Fig. 1)
See Geitler in Rabenhorst (1952, Vol. 14, p. 755).
Vegetative cells 4.0u diam. (main filament), 5.5u diam.
(branches); heterocysts 4.2u diam., 10.7u long; filaments
10.7u diam.; sheath 2.7-5.2u thick.

Tykeson Pond (x-2).

Scytonema fritschii Ghose, B. Linn. Soc. Bot. 46: 542.

 

1925.
(P1. XXVI, Figs. 4, 5)
See Desikachary (1959, p. 458) and Geitler in Rabenhorst

(1952, Vol. 14, p. 755).

117

Vegetative cells 6.0u diam., 7.0-15.9u long; hetero-
cysts 8.2-8.7u diam., 15.9-20.9u long; filament 27.8u diam.

The plant in question best agrees with this Species on
the basis of vegetative cell length and width, heterocyst
length and width, cross walls distinct, and false branches
geminate; one exception being that the sheath is wider in
the plant observed than in plants already described for this
Species.

Mission Well (H-22).

Tolypothrix Kuetzing, Phycologia generalis, oder

 

Anatomig, Physiologie und Systemkunde der Tange, 227. 1845.

 

 

 

Tolypothrix distorta var. pencillata (Agardh) Lemmermann,

Kryptogamenflora der Mark Brandenburg. Algen. 5: 218. 1910.
(P1. XXVI, Fig. 5) I

See Geitler in Rabenhorst (1952, Vol. 14, p. 719).

Vegetative cells 7.0-7.5u diam., 5.2-7.0u long; hetero-
cysts 10.0u diam., 10.4-12.2u long; filament 15.0u diam.

Cells quadrate or shorter than wide; heterocysts almost
conical up to cylindrical; cells lightly constricted at the
cross walls.

Tykeson Pond (x-5).

Tolypothrix tenuis Kuetzing emend. J. Schmidt, Bot.
Tidsskr. 22: 585. 1899.
(P1. XXVI, Fig. 2)

See Prescott (1962, p. 558).

118

Vegetative cells 4.7-5.8u diam., 5.2-7.0-(10.4)u long;
heterocysts 6.5-7.5u diam., 8.7-15.9u long; filaments 8.7—
10.4u diam.

Cells quadrate to longer than wide, generally not con-
stricted at the cross walls.

Mission Well (A-8; H-15); Tykeson Pond (x-8).

Stigonema C. A. Agardh, Systema algarum 1: xxii. 1824.

 

“Stigpnema hormoides (Kuetzing) Bornet & Flahault, BBB.
Sci. Nat. Bot. Biol. Vegetale, 68. 1887.,
(P1. XXVII, Fig. 6)
See Geitler in Rabenhorst (1952, Vol. 14, p. 499).
Vegetative cells 5.2u diam., 5.0-4.6u long; filament
10.4u diam.
Filaments small and almost uniseriate.

Tykeson Pond (x-20).

Stigonema Sp.

 

(Pl. XXVII, Fig. 7)
Vegetative cells 7.0u diam., filament 17.4-20.9u diam.
Mission Well (A-8). This genus was previously reported

from Mission Well by Sieminska (1965).

Family Rivulariaceae

Calothrix C. A. Agardh, Bystema algarum 1: xxiv. 1824.

 

Calothrix atricha Frémy, Les Myxophycées BB l'Afrique

équatoriale francaise, 261. 1950.

119

(P1. XXVII, Fig. 5)
See Prescott (1962, p. 552).
Vegetative cells at base of colony 8.7u diam., 8.1u
long; heterocysts 10.4u diam., 12.2u long.
Trichome not tapering Sharply; heterocysts basal, usually
in pairs; vegetative cells one to one and one-half times
longer than wide.

Tykeson Pond (x-9).

Calothrixgparietina (Ngegeli) Thuret, Ann. Sci. Nat.

Bot. Biol. Vegetale 1(6): 581. 1875.
(P1. XXVII, Fig. 5)

See Geitler in Rabenhorst (1952, Vol. 14, p. 604).

Vegetative cells 5.5-10.4u diam., 5.5-17.4u long; hetero-
cysts 10.4-12.2u diam., 10.4-15.7u long; filament 15.9u diam.

Filament yellow-brown, occasionally occurring singly;
cells mostly one and one-half to three times as long as wide,
at the base Shorter than wide; trichome ending in a hair;
heterocyst basal, seldom intercalary, wider than vegetative
cells.

Tykeson Pond (x-21).

Calothrix stellaris Bornet & Flahault, Ann. Sci. Nat.
Bot. Biol. Vegetale 5(7): 565. 1886.
(Pl. XXVII, Fig. 4)
See Geitler in Rabenhorst (1952, Vol. 14, p. 610) and

Prescott (1962, p. 554).

120

Basal cell 8.7n diam., 7.0u long; heterocyst 8.9u diam.
9.5u long; filament 15.6u diam. (at base).

Cells constricted at the cross walls; filaments curved.
This species closely resembles B, BBBBB Bornet & Flahault,
1886, which has a lamellated sheath; the former also is close
to B, castellii Bornet & Flahault, 1886, which has cells one-
half to one-fourth as long as wide.

Tykeson Pond (x-5).

DISCUSSION

Speculation is invited as to why some groups of algae
were more prevalent in either Mission Well or Tykeson Pond.
The Chlorococcales, a group of green algae, occurred abundant-
ly in both ponds. The number occurring in each body of water

would be relatively equal if the genus Scenedesmus were not

 

considered. Twenty-one species and 57 different Scenedesmus
taxa were found in Mission Well of which 15 of the latter
were found to be living upon a submerged spruce branch.

It is interesting that submerged spruce branches should offer

the most favorable habitat for Scenedesmus, and perhaps micro-

 

elements provided by the spruce bark helped induce environ—
mental forms. In Tykeson Pond, where only seven Species and

nine taxa of Scenedesmus were found, there are no Spruce

 

trees or branches to be found in the area. Other chloro-
coccalean greens would not appear to be influenced in their
proliferation and growth forms by spruce branches since these
algae occur in almost equal numbers in both ponds; however,
some Species may be influenced.

The desmids, a large group of Chlorophyta not studied
by the author, occurred in great numbers. There were approxi-
mately 145 taxa found in Mission Well as opposed to approxi—

mately 97 in Tykeson Pond. In Mission Well, the predominant

121

122

marginal aquatic plant was Carex rostrata, whereas the genus
Carex occurred less frequently in proportion to other aquatic
plants in Tykeson Pond. In other ponds and bogs examined
where the predominant aquatic plants were species of Carex,
the author has found desmids to occur in great numbers and
variety.

In Tykeson Pond, more surface area was occupied with
fallen trees and branches and more Species of aquatic plants
were noted than in Mission Well. This may have allowed for
more suitable substrates for attached and entangling forms
of filamentous Chlorophyta, Chrysophyta, and Cyanophyta.
Perhaps these filamentous forms just mentioned would provide
more suitable substrates for the unicellular epiphytes.
These unicells appeared more predominantly in Tykeson Pond

and included the following: Characium and Chaetosphaeridium

 

 

in the Chlorophyta, and Stipitococcus, Characiopsis, and
Ophiocytium in the Chrysophyta. The diatoms, a major group
of the Chrysophyta not studied by the author, should be
mentioned here. Many attached forms were observed in this
group growing on other filamentous algae. These epiphytic
forms were more predominant in Tykeson Pond. Free floating
forms of diatoms were found in both ponds, but this was not
extraordinary since unattached diatoms were usually noted in
other bodies of water examined by the author. If diatoms had
been studied, it would seem obvious that a higher percentage

of the plants recorded would be from the Chrysophyta.

125

The flagellates in the Chlorophyta, Euglenophyta, and
Pyrrhophyta were found in both ponds. These did not comprise
a major portion of all taxa encountered; however, their
occurrence in both ponds was significant. In other ponds
studied which were also relatively Shallow, the author has

found a notable abundance of flagellates.

SUMMARY

Mission Well and Tykeson Pond both lie in the northern
Mission Mountains of northwestern Montana, the former at
elevation 5275 feet (1608 meters) and the latter at 5100-
5200 feet (940-970 meters).

Sieminska (1965) published a paper on fresh water algae
from Mission Well. Other published works on this subject
matter are not known for either area.

One objective in this current investigation was to collect
and identify the fresh water algae, excluding desmids and
diatoms. To carry out this objective, representative algal
samples were collected from both ponds. The author examined
40 vials from each study area; in addition, Vials 5 Mon 12
from Mission Well and 2067 and 2081 from Tykeson Pond were
studied. These latter three vials are in the algal herbarium,
Michigan State University, whereas the former vials are in
the author's personal collection.

Both bodies of water are almost completely encircled by
coniferous growth, a wider variety of species occurring at
lower elevations. More taxa of aquatic plants, other than
algae, occur in Tykeson Pond than in Mission Well; 25 were
recorded in the former and 11 in the latter. During the
summer months, the pH was found to vary between 7.2-8.5 in

Mission Well and 7.4-8.2 in Tykeson Pond.

124

125

The author recorded a total of 89 different algal
genera, 215 different species, and 244 different taxa from
Mission Well and Tykeson Pond, excluding desmids and diatoms.
Sieminska (1965) recorded four additional taxa from Mission
Well not found by the author from either pond. Thus 219
different Species and 248 different taxa are known, of which
eight or 5.2% of the latter are new. Eighty-seven species
and 108 taxa are exclusively in Mission Well, 75 Species and
78 taxa are exclusively in Tykeson Pond, and 57 species and‘

62 taxa are common to both ponds. These are as follows:

DIVISION GENERA SPECIES‘ ALL TAXA
Total % Total % Total %
No. Found No. Found No. Found
CHLOROPHYTA 45 50.6 117 '55.4 142 57.5
CHRYSOPHYTA 11 12.4 21 9.6 21 8.5
EUGLENOPHYTA 6 6.7 15 6.9 15 6.0
PYRRHOPHYTA 4 4.5 7 5.2 7 2.8
CYANOPHYTA 25 25.8 59 26.9 65 25.4

Another group of Chlorophyta, the desmids, were not investi-
gated by the author. Sieminska (1965) recorded 84 desmid
taxa from Mission Well. D. C. Jackson, Michigan State Uni-
versity, has thus far recorded approximately 191 different
desmid taxa from Mission Well and Tykeson Pond. All algae
considered (except diatoms), approximately 459 different taxa

are known from these two ponds. Of these, approximately 202

126

are exclusively in Mission Well and 124 in Tykeson Pond,

115 being common to both ponds.

Having presented the list of algae, some interesting

aspects of this study are noteworthy:

A) Over 50% of the genera, species, and taxa found

belong to the Chlorophyta.‘ This figure does not

include the desmids, a group of green algae occurring

abundantly in the two areas studied.

1)

2)

5)

6)

Fewer members of the Volvocales were identified
than one might expect to find in such habitats
encountered.

Eremosphaera viridis was found in water where

 

the pH was recorded as 8.1-8.5. This species is
usually an indicator for pH 6.0-6.8.

A new species of Coelastrum was found from
Mission Well.

A new form of Tetraédron planctonicum was found
in Tykeson Pond.

The genus Ennalax was recorded for the first time
in North America.

The genus Scenedesmus represented approximately

 

one-sixth of all taxa found during this study.

a) Five new taxa of this genus were described.

b) Thirteen different taxa were identified living
upon a submerged Spruce branch, indicating

closely related taxa within a single community.

B)

C)

D)

E)

127

Approximately 12% of the genera, 10% of the species,

and 8% of the taxa found belong to the Chrysophyta.

These figures do not include the diatoms, a group

of golden-brown algae occurring abundantly in the

two areas studied.

Approximately 7% of the genera and species, and 6%

of the taxa found belong to the Euglenophyta.

1) A new species of Petalomonas was found from
Mission Well.

Approximately 5% of the genera, 5% of the species,

and 5% of the taxa identified belong to the

Pyrrhophyta.

Approximately one-fourth of all genera, species, and

taxa identified belong to the Cyanophyta.

1) Different Chroococcalean Cyanophyta are more
prominant in Mission Well, whereas different
Hormogonales appear more frequently in Tykeson

Pond.

128

MAP I. MISSION WELL: COLLECTING STATIONS,
"A" collections (1-10) made July 15, 1965. H cOllections
(1-25) made August 5, 1965. G collections (1-4) made

July 15, 1966. Y collection (1) made July 26, 1966.

129

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x . . . o .. .o . .. . .
.. i . .. .o. .
.. o .. ...v . ... . ...
4. . .I . . . ~ . . ..
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. ... —... . ,
v. a A. . . . . . .a. a
.
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- —-' 'C u I n I
l . I y l

vegetation

1... ..
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. ...
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on.
1.1
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. .. . .4.'. .-
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.
u u
a...

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o

150

MAP I I . TYKESON POND : COLLECTING STAT IONS .
x collections (1-21) made July 15, 1965. B collections
(1-14) made August 5, 1965. C collections (1-4) made

July 15, 1966. Q collection (1) made July 26, 1966.

151
TYKESON POND

 

 

 

floating mat

 

x-15 x-1
N B-1O
x-1-

B-8

x-16
x-11

B-11 x-1O

B-6
. -17
- - - 9.525M. x x-°
Scale C-2

 

C‘r

X-ig xi". X-B

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x-1 B-1

MAP II

152

MAP III. MISSION WELL: DEPTH CONTOURS, pH STATIONS, and

TEMPERATURE STATIONS

1965. Readings taken at STATION V on August 5th with

a heavy overcast sky.

TIME pH H20 TEMP. C AIR TEMP. C
10:50 A.M. 8.1 14.0 15.0
12:50 P.M. 8.5 15.0 16.5

1966. Readings taken at STATIONS I-V on July 26th-27th
with a cloudless sky; moon three-quarters full, visible
until 9:50 P.M; night wind movement: very slight from E to

W; and day wind movement (July 27th): moderate from W to E

(9:00 A.M.).
TIME pH READINGS at STATIONS: H20 TEMPje AIR TEMP.
I II III IV V C C

2:50 P.M. 7.8 7.6 7.5 7.5 7.4

4:50 P.M. 7.6 7.5 7.4. 7.4 7.6 25.0

6:50 P.M. 7.2 7.5 7.4 7.5 7.4 22.0

8:50 P.M. 7.5 7.5 7.4 7.2 7.2 21.0 11.0
10:50 P.M. 7.5 7.5 7.6 7.5 7.4 20.0
12:50 A.M. 7.5 7.2 7.5 7.5 7.2 19.0 5.0
2:50 A.M. 7.5 7.5 7.5 7.5 7.4 18.5 4.5
4:50 A.M. 7.4 7.2 7.4 7.5 7.4 17.5 5.5
9:00 A.M. 7.4 7.4 7.5 7.4 7.4 18.0 15.5
12:15 P.M. 7.6 7.7 7.8 7.7 7.9 20.5 20.0
2:50 P.M. 7.7 7.5 7.7 7.8 7.5 22.5 24.0

*indicates location where H20 temperatures were taken (on map).

155

MISSION WELL

 

53:33 floating mats
* ” and shoreline
vegetation

 

 

 

.4_7 ___
depth in meters

 

0*

 

Scale _19'05 17 IV a:

MAP III

154

MAP IV. TYKESON POND: DEPTH CONTOURS, pH STATIONS, and

TEMPERATURE STATIONS

1965. Readings taken at STATIONS I-IV on July 15th

with a partly cloudy Sky.

TIME pH READINGS followed by H20 TEMP. READINGS*
at STATIONS:

I II III IV

9:50 A.M. 8.2 7.9 7.8 7.7
20.0 20.2 17.8 16.9

12:50 P.M. 8.0 8.0 8.0 7.4
21.5 21.0 22.0 17.5

H20 temp. C at 5-5 cm. below surface.

1965. Readings taken at STATIONS I-II on August 5rd

with an overcast sky with moderate rain and air temp. 18.0 C.

TIME pH READINGS followed by H20 TEMP. READINGS
at STATIONS:

I II
4:15 P.M. 7.5 7.9
20.5 21.0

1965. Readings taken at STATION I on August 5th with

a cloudy sky and air temp. 19.0 C.

TIME pH READING followed by H20 TEMP. READING
at STATION:

I
2:15 P.M. 8.0
20.0

155
TYKESON POND

 

 

 

 

.6
depth in meters //

N / / 1):\
/

 

 

" ”3-72" 3': ‘74:. . .
:figagg floating mat //,:

I-IV = pH / , . \

stations // k
I I

 

 

156

MAP V. MISSION WELL: AQUATIC PLANTS

number indicates general distribution only.

Carex rostrata Stokes.

 

Nuphar variegatum Engelmann.

 

Eleocharis Sp.

 

Potentilla palustris (Linnaeus)
Menyanthes trifoliata Linnaeus.

Marchantia polymoppha Linnaeus.

 

Epilobium Sp.

 

Carex Sp.

Calamagrostis Sp.

 

Carex limosa Linnaeus.

Toefieldia pusilla (A. Michaux)

 

Scopoli.

Persoon.

157

MISSION WELL

 

 

 

 

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158

MAP VI. TYKESON POND: AQUATIC PLANTS

F3
(3‘
0

number indicates general distribution only.

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Potentilla palustris (Linnaeus) Scopoli.
2. Sium suave Walter.
5. Menyanthes trifoliata Linnaeus.
4. Drepanocladus Sp.
5. Nostoc caeruleum Lyngbye.
6. Nuphar variegatum Engelmann.
7. Potamogeton natans Linnaeus.
8. Sparganium minimum (Hartman) Fries.
9. Potamogeton pusillus Linnaeus.
10. Eleocharis Sp.
11. Epilobium Sp.
12. Mentha arvensis Linnaeus.
15. Lycopus uniflorus A. Michaux.
14. Scutellaria ppilobifolia Hamilton.

 

15. Utricularia vulgaris Linnaeus.

 

16. Spirodela polyrhiza Schleiden.

17. Carex Sp.

18. Salix Sp.

19. Polygonum natans (A. Michaux) Eaton.

20. Populus Sp.

21. Potamogeton alpinus var. tenuifolius (Rafinesque-
Schmaltz) Ogden.

 

 

22. Iemna minor Linnaeus.

 

25. Utricularia minor Linnaeus.

24. Phormidium Sp.

 

25. Mnium Sp.

159

TYKESON POND

 

 

 

floating mat 2
21

 

.22 S

18
15

18 21

15 6
18

18
15

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224

MAP VI

 

PLATES i

140

FIGS.
1.
2.

141

PLATE I

Pandorina morum Bory, (A-7)l ..............

 

 

Gloeocystis.planctonica (West & West)

Lemmermann, (H-19) ........................

Volvox tertius A. Meyer, (Redrawn from

 

Prescott 1962, p. 666, after Smith) .......

Gloeocystis gigas (Kuetzing) Lagerheim,

 

(x-Z) .....................................

Asterococcus superbus (Cienkowski)

 

Scherffel, (x-8) ..........................

Asterococcus limneticus G. M. Smith, (x-2)

 

FIGS. 4, 6 (450x); 1, 2, 5 (900x).

1indicates vial from which taxon was illustrated.

PAGE
18

21

18

20

19

19

142

Nd.

 

.l,, 5' Q
- ;:‘|’)‘- 0‘ -

,3 .
*~—-_—

v‘n’

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-.\‘-

PLATE I

 

145

PLATE II

FIGS. PAGE

1. Gloeocystis major Gerneck ex Lemmermann,

5. Gloeocystis botryoides (Kuetzing) Naegeli,
(x-15) .................................... 20
4. Gloeocystis ampla (Kuetzing) Lagerheim,

(x-15) .................................... 19

FIGS. 2 (450x); 1 (860x); 3, 4 (900x).

14:4

PLATE II

-r'

  
 

   
  
   
   
    

  

 

r -'o--—r---~.'__‘_ -l-v".’l'.-"o-~_.._ -‘_..-‘
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c- , ’- u .. -- ~_ ‘ ‘\ \ ‘
0 ,5 -,r .'..~._ . ‘.‘ Q ‘\ 3
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FIGS.

FIGS.

145

PLATE III

Palmodictyon varium (Naegeli) Lemmermann,

 

Schizochlamys gelatinosa A. Braun in

 

Kuetzing, (H-12) ............................

Elakatothrix viridis (Snow) Printz, (H-12) ..

 

Sphaerocvstis schroeteri Chodat, (B-8) ......

Palmella mucosa Kuetzing, (X-9) .............

5, 6 (450x); 1-4 (900x).

PAGE

22

23
24
23
22

PLATE III

2‘ 25."! J ‘
I ' ‘
,.

. .‘V-Qo’
-‘ .
\ ' .
‘ . '~-. -

'1' .
v '.
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.: L“
.l.

 

I

147

 

 

 

 

 

 

 

 

PLATE IV
FIGS.
1. Radiofilum conjunctivum Schmidle, (x-S) .....
2. Radiofilum flavescens G. S. West, (Redrawn
from Prescott 1962, p. 674) .................
3. Ulothrix subconstricta G. S. West, (H-18) ...
4. Ulothrix subtilissima Rabenhorst, (x-S) .....
5. Microspora leofgrenii (Nordstedt) Lagerheim,
(H-4) .......................................
6, 7. Microspora pachyderma Lagerheim, 6 (x-15):
7 (x-Z) .....................................
8. Microsoora stagnorum (Kuetzing) Lagerheim,
(A-e) .......................................
9. Microspora tumidula Hazen, (x-2) ............
FIGS. 1, 4, 7, 9 (860x); 5, 5, 6, 8 (900x).

PAGE

24

25

25

26

26

26

27

148
PLATE IV

.-. u-

.- .... _- —. a'_ _ _‘_ ,‘fi:.—. ... rv— u.- .— _— ~— -— -- .
.---1---, . l . .--. , - J. --..-.-.- 1....-. ---.
- . . I . ' . .. ~ ~ _ _ . . r _

 

   

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no

--.,.---' "' ’.:

 

 

 

 

”(IN

 

149

 

PLATE V
FIGS . PAGE
1. Cylindrocapsa conferta W. West, (B-4) ...... 27
2. Cylindrocapsa geminella Wolle, (x-2) ....... 28

 

5. Microthamnion strictissimum_Rabenhorst,

4. Microthamnion kuetzingianum Naegeli in
Kuetzing, (Redrawn from Prescott 1962, p.
682) ....................................... 28

5. Protoderma viride Kuetzing, (x-2) .......... 29

 

FIGS. 2, S (860x); 1, 3 (900x).

 

 

 

 

FIGS.

10.

11.

FIGS.

151

PLATE VI

Chaetosphaeridium pringsheimii ? f. conferta

 

 

Klebahn, (x-2) .............................

Chaetosphaeridium Sp., (x-S) ...............

 

0101M

Bulbochaete sp., (H-22) ....................
Oedoqonium sp., (x-20) .....................
Oedoqonium ambiceps (Jao) Tiffany, (Redrawn
from Prescott 1962, p. 754) ................

KentrOSphaera gloeophila (Bohlin)

 

Brunnthaler, (H-20) ........................

. Characium pringsheimii A. Braun, 8 (H-lS):

 

9 (x-20) ...................................

Characium ornithocephalum A. Braun, (x-2) ..

 

Characium coronatum Reinsch, (x-2) .........

 

5, (200x); 3, (450x); 1, 10, 11 (860x); 2, 4,

7-9 (900x).

PAGE

50
50
31
52

32

35

54

54

33

152

PLATE VI

   

.--.
-.-

_ 7317-911 ‘..P l

---—u

9f?-“J'I-'.’.\ -.’J : \' .-. -

 

, , . , ,
,‘N—‘ruaumflm

 

_'

 

 

 

 

 

153

PLATE VII

FIGS. PAGE

1. Pediastrum araneosum var. rugulosum

 

(G. s. West) G. M. Smith, (H-12) ........... 54

2-4. Pediastrum boryanum (Turpin) Meneghini,

 

 

2 (x-l); 3 (x-8): 4 (x-9) .................. 35
5. Pediastrum tetras Ralfs var. tetras, (x-8) . 58
6. Pediastrum braunii Wartman, (A-l) .......... 55

 

7. Pediastrum dupJex var. cohaerens Bohlin,

 

 

 

 

(3-5) ...................................... 56

8. Pediastrum duplex Meyen, var. duglex (x—8) . 36

9. Pediastrum braunii Wartman, (A-S) .......... 35

10. Pediastrum tetras Ralfs, var. tetras, (x-S). 58

 

FIGS. 1, 4 (450x); 10 (860x); 2, 3, 5—9 (900x).

154

PLATE VII

 

 

 

 

8.

9.

155

 

 

 

 

 

 

 

 

 

 

PLATE VIII

Pediastrum obtusum Lucks, (x-8) ............
Pediastrum tricornutum Borge, var.
tricornutum, (H-li) ........................
Sorastrum Spinulosum Naegeli, (x-8) ........
Coelastrum cambricum Archer, var. cambricum,
(H-14) .....................................
Coelastrum cambricum var. intermedium
(Bohlin) G. s. West, 5 (H-15): 6 (x—S) .....
Coelastrum microporum Naegeli, (H-22) ......
Coelastrum rugulosum s9, g9!,, (H-14) ......
Botryococcus braunii Kuetzing, (x-9) .......

 

FIGS. 1-9 (900x).

38

38

39

39
59
4O

4O

'1

156

PLATE VIII

 

 

 

 

157

PLATE IX

FIGS. PAGE

1. Ankistrodesmus falcatus (Corda) Ralfs var.

 

falcatus, (x—2) ............................ 41

 

2. Ankistrodesmus falcatus var. acicularis

 

 

(A. Braun) G. s. West, (H-17) .............. 41

5. Ankistrodesmus fractus (West & West)

 

Brunnthaler, (H-4) .... ..................... 42

4. Ankistrodesmus spiralis (Turner) Lemmermann,

 

(H-il) ..................................... 42

 

 

(x-S) ...................................... 42
6. Dictyosphaerium pulchellum Wood, (x—15) .... 42
7. Eremosphaera viridis DeBary, (H-11) ........ 43

 

8. Quadrigula chodatii (Tanner-Fulman) G. M.

 

 

Smith, (x-7) ............................... 47
9. Quadrigula closterioides Printz, (x-S) ..... 47
10. Qpadrigula lacustris G. M. Smith, (x-7) .... 48

 

FIGS. 7 (200x); 1, 5, 9 (860x); 2-4, 6, 8, 10 (9OOX).

158

P LATE IX

      
   

- .
.. .- ;_ :

I ",

‘40:-

5;;{la-Mxh“

"A. -

@‘3

1
F»;
. -.

.. 1““... I .I ... ' ‘
33.0,: 15;!

159

 

 

 

 

 

 

 

 

PLATE X
FIGS . PAGE
1. Kirchneriella lunaris (Kirchner) Moebius,
(3-1) ...................................... 43
2. Nephrocytium obesum West & West, (x-2) ..... 44
3. Oocystis crassa Wittrock and Nordstedt,
(x-2) ...................................... 45
4. Nephrocytium lunatum W. West, (x-1) ........ 44
5. Oocystis pusilla Hansgirg, (x-8) ........... 46
6. Oocystis solitaria var. Egjg£_Wille, (x-2) . 46
7. Oocystis submarina Lagerheim, (H—12) ....... 47
8. Oocystis elliptica W. West, (x-2) .......... 45
FIGS. 1 (450x); 3, 6, 8 (860x); 1 (enlarged cell),

2, 4, 5, 7 (900x).

160

PLATE X

l
..w.

L...

NmanWwMJMK .

.
X
.

 

 

 

FIGS.

14,

16,
18,

9 more

10.

11.

12.

13.
15.

17.
19.

20.

21.

22.

23.

161

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLATE XI

PAGE
Oocystis borgei Snow, (x-20) ............... 44
Oocystis lacustris Chodat, (H-12) .......... 46
Tetraedron minimum (A. Braun) Hansgirg var.
minimum, (x-8) ............................. 49
Tetraedron enorme var. aequisectum Reinsch,
(H—6) ...................................... 49
Tetraédron enorme f. minor Reinsch, (H-22) 49
Tetraedron regulare var. granulata Prescott,
(Redrawn from Prescott 1962, p. 782) ....... 50
Tetraedron trilobulatum (Reinsch) Hansgirg,
(x-2) ...................................... 51
Tetraedron caudatum (Corda) Hansgirg var.
caudatum, (H-22) ........................... 48
Crucigenia apiculata (Lemmermann) Schmidle,
(H-ZZ) ..................................... 53
Crucigenia rectangularis (A. Braun) Gay,
(H—15) ..................................... 54
Crucigenia tetrapedia (Kirchner) West & West,
(H-22) ..................................... 54
Enallax coelastroides (Bohlin) Skuja, (H-25) 55
Crucigenia quadrata Morren, 14 (x-S);
15 (x-19) .................................. 54
Trochiscia prescottii Sieminska, (H-22) .... 52
Scenedesmus acutiformis Schroeder var.
acutiformis, 18 (x-7); 19 (H-22) ........... 56
Actinastrum hantzschii var. fluviatile
Schroeder, (Redrawn from Prescott 1962,
p. 790) .................................... 55
Zoochlorella parasitica Brandt, (Redrawn
from Prescott 1962, p. 766) ................ 53
Trochiscia reticularis (Reinsch) Hansgirg,
(x-8) ..................................... -. 52
Tetraédron trigonum Hansgirg, (x-2) ........ 51

FIGS. 8, 14, 15, 25 (860x); 1-6, 9—13, 16-19, 22 (900x).

162

PLATE XI

 

FIGS.

10, 11.

12.

13.

14.

15.

16.

17.

18, 19.

20.

21.

22, 23.

24, 25.

163

PLATE XII

Scenedesmus acutiformis Schroeder var.
acutiformis, 1 (H-22); 2, 3 (H-6) ..........
Enallax coelastroides (Bohlin) Skuja, (H-15)

 

 

Scenedesmus acutus Meyen, var. acutus f.

 

acutus, 5 (H-4): 6 (H-1) -------------------

Scenedesmus acutus f. costulatus Uherkovich,

 

 

(H-4) ......................................

Scenedesmus apiculatus (West & West) Chodat,

 

8 (H—14);9 (H-18) ..........................

Scenedesmus armatus Chodat var. armatus

 

(H-18) .....................................

Scenedesmus armatus var. bicaudatus (Gugliel-

 

 

metti-Printz) Chodat f. bicaudatus, (H-18) .

Scenedesmus arcuatus Lemmermann var.

 

 

arcuatus, (B-13) ...........................

 

Scenedesmus armatus var. boglariensis f.

 

bicaudatus Hortobagyi, (H-18) ..............

 

Scenedesmus armatus var. boglariensis

 

 

Hortobagyi ii boglariensis, (H-18) ........

Scenedesmus‘armatus var. boglariensis f.

 

 

multispinosus forma nov., (H-18) ...........

Scenedesmus arcuatus var. capitatus

 

 

G. M. Smith, (H-25) ........................

Scenedesmus armatus var. boglariensis f.

 

 

semicostatus Hortobagyi, (H-18) ............
Scenedesmus brasiliensis Bohlin var.

brasiliensis, (X-8) ........................

 

Scenedesmus decorusxnnm.bicaudatojgranulatus
(Hortobagyi) Uherkovich, (H—22) ............

Scenedesmus brevispina (G. M. Smith) Chodat

 

var. brevispina, (H-22) ....................

 

Scenedesmus denticulatus var. linearis
Lagerheim f. linearis, 24 (x-B); 25 (H-22) .

 

FIGS. 1-25 (900x).

PAGE

56
55

57

57

57

58

59

58

59

59

60

58

60

61

61

61

62

FIGS.

5.

6-8.

9.

10.

11.

12.

13-15.

16, 17.

18.

19.

20.

21.

22, 23.

24-26.

FIGS.

165

PLATE XIII

Scenedesmus denticulatus var. linearis f.

 

 

costatus forma nov., (x-20) ................

 

Scenedesmus denticulatus var. linearis f.

 

 

perigranulatus (Hortobagyi) Hoham nom. nov.
(H-9) ......................................

Scenedesmus denticulatus var. polydenticu-

 

 

latus Hortobagyi, (A-7) ................ ....
Scenedesmus armatus var. microspinosus var.
nov., (H-18) ............................. ..

Scenedesmus ecornis var. disciformis Chodat

 

 

 

 

f. disciformis, (x-8) ......................

 

Scenedesmus ecornis Chodat var. ecornis
6 (x-4); 7 (x-8); 8 (H-17) ............... ..

Scenedesmus intermedius var. acaudatus

 

 

 

Hortobagyi f. acaudatus, (H-4) .............

 

Scenedesmus granulatus West & West f.

 

granulatus, (H-20) .........................

 

Scenedesmus opoliensis Richter var.

opoliensis f. opoliensis, (H-24) ...........

 

Scenedesmus intermedius var. acaudatus

 

 

Hortobagyi f. acaudatus, (H-17) ... .........

 

Scenedesmus ovalternus Chodat var.
ovalternus, 13 (x—2); 14 (H-7); 15 (x-7) ...

Scenedesmus guadricauda var. semiSpinosus

 

 

var. nov., (A-10) ..........................
Scenedesmus guadricauda var. longispina
(Chodat) G. M. Smith f. longispina, (H-18) .

Scenedesmus spinosus var. semiSpinosus var.

 

 

 

nov., (A-7) ................................
Scenedesmus subspicatus var. brevicauda
(G. M. Smith) Chodat, (H96) ................

Scenedesmus guadricauda var. guadrispina ? f.

 

 

 

 

granulatus (Hortobagyi) Uherkovich, (A-9) ..
Scenedesmus serratus (Corda) Bohlin
f. serratus, 22 (H-14); 23 (H-19) ...... ....

Scenedesmus Spinosus Chodat var. spinosus,

 

 

 

 

24 (H-19); 25 (H-G): 26 (A-7) ..............
6, L3 (860x); 1 5, 7—12, L453€ (900x).

PAGE

62

63

63

60

64

64

65

64

65

65

65

67

66

68

68

67

67

68

 

FIGS.
1.

2.

10.

11.

12.

13.

167

 

PLATE XIV
Scenedesmus sp., (x-21) ....................
Scenedesmus Sp., (H-20) ....................

 

Scenedesmus guadricauda var. maximus West &

 

West, (H-22) ...............................

Tetradesmus wisconsinense G. M. Smith,

 

4, 5 (H-15); 6, 7 (H-22) ...................

Scenedesmus tibicensis Uherkovich, (H-17) ..

 

Scenedesmus guadricauda (Turpin) Brebisson

 

var. guadricauda f. guadricauda, (H-12) ....

 

 

Mougeotigpsis calospora Palla, (Redrawn from

 

Skuja 1929, p. 45) .........................

Zygogonium ericetorum Kuetzing var.

 

ericetorum, (X—3) ..........................

Spirogyra communis (Hassall) Kuetzing,

 

(Redrawn from Randhawa 1959, p. 293) .......

Mougeotia genuflexa (Dillwyn) C. A. Agardh,

FIGS. 13 (200x): ii (860x); 1-9 (900x).

PAGE

69

69

66

7O

69

66

71

72

71

7O

169

PLATE XV

FIGS. PAGE

1. Stipitococcus vasiformis Tiffany, (Redrawn

 

from Pascher in Rabenhorst Vol. 11, 1939,
p. 1062) .................................... 73

2. Chlorobotrys regularis (W. West) Bohlin,

 

 

 

 

(Redrawn from Prescott 1962, p. 846) ........ 74
3 Chlorellidiopsis separabilis Pascher, (A-5) . 74
4. Characiopsis acuta Borzi, (X-2) ............. 74
5. Characiopsis heeringiana Pascher, (x-2) ..... 75
6. Characiopsis tuba Lemmermann, (x-2) ......... 76
7. Characiopsis ? sublinearis Pascher, (H-6) ... 75

 

 

8. Ophiocvtium bicuspidatum (Borge) Lemmermann,

 

 

 

 

(x-2) ....................................... 76

9. Ophiocytium capitatum Wolle, (x—15) ......... 77
10. Ophiocytium lagerheimii Lemmermann, (H-15) .. 77
11. Ophiocytium cochleare A. Braun, (x-3) ....... 77
12. Ophiocytium parvulum A. Braun, (x-2) ........ 78
13. Ophiocytium majus Naegeli, (x-7) ............ 78

 

FIGS. 15 (450x); 4-6, 8, 11, 12 (860x); 3, 7, 9, 1O (900x).

170

PLATE XV

11

3

{I

 

 

 

 

 

 

0

13

171

PLATE XVI

FIGS. PAGE

1. Tribonema bombycinum (C. A. Agardh) Derbes &

 

Solier, (x-15) ............................ . 79

2. Tribonema minus Hazen, (x-2) ............... 80

 

3. Tribonema utriculosum (Kuetzing) Hazen,

 

 

 

(H-11) ..................................... 80

4. Ophiogytium parvulum A. Braun, (x-7) ....... 78

5, 6. Leuvenia natans Gardner, (G vials) ......... 79
7. Synura uvella Ehrenberg, (x-19) ............ 81

 

8. Rhipidodendron huxleyi S. Kent, (Redrawn

 

from Pascher 1914, p. 115) ................. 82

9. Mallomonas acaroides Perty, (Redrawn from

 

Prescott 1962, p. 852) ..................... 81

10. Dinobryon sertularia Ehrenberg, (H—22) ..... 82

 

FIGS. 5, 6 (450x); 2, 7 (860x); 1, 3, 4, 10 (900x).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

173

PLATE XVII

FIGS.

1. Euglena Sp., (x-4) .......................

2. Euglena ? gracilis Klebs, (x-3)
3-9. Petalomonas octocostatus sp. nov.; 3,

view, (H-19); 4, ventral view, (A-3);

sal view, (A-3); 6, posterior end, (A-10);

7, dorsal view, (A-10); 8, anterior end,

(A-10); 9, ventral view, (A-10)

FIGS. 1, 2, 6-9 (860x); 3-5 (900x).

ventral

5, dor-

89

 

.174

PLATE XVII

 

 

 

 

 

 

 

 

FIGS.

10.

11.

FIGS.

175

PLATE XVIII

Lepocinclis Sp., (B-13) ....................

 

. Phacus ? hamatus Pochman, (x-11) ...........

Phacus sp., (B-9) ..........................

Phacus lismorensis Playfair, (H-3) .........
Phacus orbicularis Huebner, (x-15) .........
Phacus ? onyx Pochman, (H-4) ...............

Trachelomonas superba var. swirenkiana

 

Deflandre, (Redrawn from Prescott 1962,

Phacus pseudoswirenkoi Prescott, (H-16) ....
Trachelomonas varians (Lemmermann)

Deflandre, (H-4) ...........................
Trachelomonas rotunda Swirenko, (A—4) ......

Menoidium Sp., (H-2) .......................

 

87

86

88
87

88

 

 

 

 

FIGS.
1.
2, 3.
4.
5, 6.
7.
8.
9.
10.
FIGS.

177

PLATE XIX

Gymnodinium palustre Schilling. (x-1) ......

 

Gymnodinium skvortzowii Schiller, (H-5) ....

Peridinium volzii Lemmermann, (x-9) ........

 

Gymnodinium undulatum Woloszynska, (H—S) ...

 

Peridinium volzii Lemmermann, (Redrawn from

 

Huber-Pestalozzi Vol. 16, Part 3, 1950,

 

 

p. 194; after Lefevre) .....................
Peridinium sp., (x-5) ......................
Gloeodinium montanum Klebs, (G-3) ..........
Cystodinium iners Geitler, (H-4) ...........

 

PAGE
90
91
92
91

92
92
93
93

178

PLATE XIX

 

 

 

FIGS.

179

PLATE XX

1. Aphanocapsa elachista var.

 

West & West,

(x-2)

conferta

 

2. Aphanocapsa elachista West & West var.

 

elachista, (H-22)

 

3. Aphanocapsa elachista var.

 

G. M. Smith,

(x-2)

planctonica

 

4. Chroococcus minutus (Kuetzing) Naegeli,

 

(H-22) ......................................

5. Chroococcus

 

limneticus,

 

6. Chroococcus

7. Chroococcus

minor (Kuetzing) Naegeli,

(x-8)

turgidus (Kuetzing) Naegeli,

 

 

FIGS. 1, 5 (430x):

2.

4-8 (900x).

PAGE

94

94

95

98

97

97

99

98

180

PLATE XX

 

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181

PLATE XXI

FIGS. PAGE

1. Aphanocapsa rivularis (Carmichael)

 

Rabenhorst, (A-7) .......................... 95

2. Aphanocapsa pulchra (Kuetzing) Rabenhorst,

 

(H-22) ..................................... 95

3. Aphanothece saxicola Naegeli, (x-14) ....... 96

 

4. Aphanothece nidulans P. Richter var.
nidulans, (x-7) ............................ 96

5. Aphanothece microscopica Naegeli, (A-1) .... 96

 

FIGS. 1-5 (900x).

   

183

 

 

 

 

PLATE XXII
F IGS . PAGE
1. CoelOSphaerium ? dubium Grunow, (x-8) ...... 99
2. Coelosphaerium kuetzingianum Naegeli, (x-8). 100
3. CoelOSphaerium naegelianum Unger, (x-l) .... 100
4. CoelOSphaerium pallidum Lemmermann, (A—1) .. 100
5

. Dactylococcopsis fascicularis Lemmermann,

 

 

(H-12) ..................................... 101
6. Qactvlococcopsis rhaphidioides HanSgirg,
(x—8) ...................................... 101

7. Eucapsis alpina var. minor Skuja, (H-11) ... 101

 

8. MerismOpedia elegans A. Braun, (x-11) ...... 102

 

9. HolOpedia irregularis Lagerheim, (H-24) .... 102

 

10. Glaucocystis oocystiformis Prescott,

 

 

 

(Redrawn from Prescott 1962, p. 876) ....... 102
11. Merismopedia punctata Meyen, (x-3) ......... 104
12. Merismopedia minima Beck, (H-22) ........... 105
13. Merismopedia tenuissima Lemmermann, (x-7) .. 104

 

FIGS. 11 (860x); 1—9, 12, 15 (900x).

184

PLATE XXII

 
 
 
   

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185

PLATE XXIII

FIGS. PAGE
1—3. Merismopedia glauca (Ehrenberg) Naegeli,
1 (x-8): 2 (H-11); 3 (x-6) ................. 105
4. Microcystis aeruginosa Kuetzing emend.
Elenkin, (x-8) .............................. 104
5. Microcystis incerta Lemmermann, (x-2) ...... 105
6. Rhabdoderma lineare Schmidle & Lauterborn,
(H-12) ..................................... 105

7. Rhabdoderma gorskii Woloszynska, (H-12) .... 105

FIGS. 5 (430x); 1-4, 6, 7 (900x).

186
PLATE XXIII

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PLATE XXIV
FIGS . PAGE
1-5. Synechococcus euryphyes G. Beck, (G-l) ..... 105
4. Lyngbya aestuarii Liebmann, (x-Z) .......... 106
5. Lyngbya martensiana Meneghini, (H-15) ...... 107
6. Lyngbya putealis Montagne, (H-ll) .......... 107
7. Oscillatoria agardhii Gomont, (H-22) ....... 108

 

8. Oscillatoria amphibia C. A. Agardh, (Redrawn

 

from Desikachary 1959, p. 204; original) ... 108

9. Oscillatoria angustissima West & West,

 

(x-s) ...................................... 108

10. Oscillatoria rubescens De Candolle, (x-8) .. 109

 

11. Oscillatoria subbrevis Schmidle, (H-22) .... 109

12. Oscillatoria tenuis var. natans Gomont,

(x-lS) ..................................... 109

 

15. Oscillatoria tenuis C. A. Agardh var.

 

Lgaglé. (x-5) .............................. 110

FIGS. 2, 5 (450x); 4. 15 (860x); 1. 5—7- 9-12 (900x).

188

 

PLATE XXIV

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L‘T

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

189

PLATE XXV

FIGS. PAGE

1. Phormidium ambiguum Gomont, (A-9) .......... 110

 

2. Phormidium ? subcapitatum Boye—Petersen,

 

 

(H-ZS) ..................................... 111

5. Phormidium tenue (Meneghini) Gomont, (A-7) . 111

 

4, 5. Anabaena cylindrica Lemmermann, 4 (H—S);
5 (x-7) .................................... 112

6. Anabaena inaeggalis (Kuetzing) Bornet &

 

Flahault, (x-8) ............................ 112

7. Anabaena lgpgpnica Borge, (Redrawn from

 

Prescott 1962, p. 895) ..................... 115
8. Anabaena torulosa (Carmichael) Lagerheim,

(H-6) ...................................... 113

 

9, 10. Anabaena ? variabilis Kuetzing, (H-ll) ..... 115

 

 

11. Nodularia gpumigena Mertens, (Redrawn from
Prescott 1962, p. 527) ..................... 114

12. Nostoc caeruleum Lyngbye, (B-S) ............ 115

 

FIGS. 1-6, 8-10, 12 (900x).

190

PLATE XXV

I . ------'
- _ .-.-. . .... ..--
'_ _>__ _, _ . -..- n---—..-o--.-'o- O

3. _. U .- i " ' . Q , '3 5, 0-. “ D‘ ‘ D " ‘ fit a -_‘ .4 :JD . ' .~
‘f‘ .3 .' . 1“ ‘ 1 " , ‘ . .‘ ‘, > ‘ ‘ ‘ D ‘ _‘ ,‘

‘..--.---..
.-- .-----..,.,,.------.---_..-.~.‘--.’-,-;-‘1~-.-. --..------.----.~

------ ----¢

 

 

AA

. ,- n . .

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

_' .D”' ‘)3.,

 

 

_-------—

_.-....—--,-_ -__..-...-pc---

' 1

     
 

__-_- ------.- ...--‘-—..

’m - og‘_g;<jm'§b.cn - -KCQQ -Q'Q

-_ ------ -
---- ---

D,-- - ‘

5..

 

 

 

 

 

 

191

PLATE XXVI

FIGS. PAGE

1. qugonema bohnerii Schmidle,(x-2) .......... 116

 

2. Tolypothrix tenuis Kuetzing emend.

 

J. Schmidt, (x-B) .......................... 117

5. Tolypothrix distorta var. pgncillata

 

 

(Agardh) Lemmermann, (x-S) ................. 117

4, 5. Scytonema fritschii Ghose, (H-22) .......... 116

 

FIGS. 4 (200x); 1 (860x); 2, 5, 5 (900x).

192

PLATE XXV I

 

 

        

           
     

."
"- .ouv'
~--./_.---

   

         

l"
l .::\| ‘\
ll"ll..‘
I\
r
I
I _
l .\I\o
. II l.ll
I,
P..;.. o...||..os..

Ant.-.
.t .

 

  

    

‘\l|ll
...Lun

  

    

- .
.—
r."':?-‘.

 

      

’
...—v-

-o-.———--
J
.

 

 

 

 

 

 

 

 

 

 

 

 

\
I“‘\
l-.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

p ...
. w
.1

 

195

PLATE XXVII

FIGS. PAGE

1. Microchaete calothrichoides Hansgirg,

 

(x-16) ..................................... 115
2. Microchaete tenera Thuret, (x-2) ........... 116
3. Calothrix atricha Frémy, (x-9) ............. 119

 

4. Calothrix stellaris Bornet and Flahault,

(x-S) ...................................... 119
S. Calothrix parietina (Naegeli) Thuret, (x-21) 119
6. Stigonema hormoides (Kuetzing) Bornet &

Flahault, (x-ZO) ........................... 118

7. Stigonema Sp., (A—8) ....................... 118

FIGS. 4 (450x): 2 (860x); 1, 3, 5-7 (900x).

194

PLATE XXVII

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

195

PLATE XXVIII

 

 

 

 

 

FIGS. PAGE
1 Eudorina elegans Ehrenberg, (2067) ......... 17
2. Enallax coelastroides (Bohlin) Skuja, (H-25) 55
3. Cystodinium iners Geitler, (Q-l) ........... 93

4. Tetraedron planctonicum G. M. Smith f.
planctonicum, (Q-1) ........................ 50
5. Enallax coelastroides (Bohlin) Skuja, (H-25) 55

 

6. Tetraédron planctonicum f. polyfurcatum

 

forma nov., (Q-l) .......................... 50

 

7-9. Enallax coelastroides (Bohlin) Skuja, (H-25) 55

FIGS. 1, 5, 4, 6 (860x); 2, 5, 7-9 (9OOX).

196

PLATE XXVIII

 

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202

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204

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I

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